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ACANTHOLIMON - (Plumbaginaceae) Acantholimons, or prickly thrifts, form dense cushions of spiny sharp-tipped leaves and attractive bloom stalks with lovely pink or white flowers followed by attractive everlasting bracts. All are very heat and drought tolerant once established.
A. hohenackeri - Spiny cushions of blue-gray with pinkish purple 10" flower spikes. Caucasus, Iran 6" (16") x 24". Sun, Xeric $code A* (Photo)
A. venustum - Very attractive spiny silver-gray cushions and short spikes of large, dark pink flowers with unusual yellow-brown calyx. Outstanding! Asia Minor 6”(10”) x 12” Sun $code A* (Photo)
AETHIONEMA – (Brassicaceae)
A very useful group of Mediterranean plants particularly well suited for sunny
walls and crevices. Most have glaucous foliage and racemes of pink flowers.
A. schistosum - Neat mounds of glaucous blue foliage covered in spring with stems of aromatic pink flowers followed by decorative seed heads. Turkey 2”(5”) x 8” Sun $code A (Photo)
AJANIA trilobata - (Asteraceae) NEW Small shrubby mounds of finely incised, tomentose foliage and numerous stems of single, yellow, rayless composite flowers. Tadjikistan, Pamir 5" x 7" Sun $code A (Photo)
ALLIUM - (Amaryllidaceae) A very large genus containing a
wide variety of plants including the onion, garlic, chives, scallion, shallot
and the leek. A vast majority of the species occur in temperate climates in the
northern hemisphere and all produce flowers in the form of an umbel on top of a
leafless stalk. With so many species to choose from, there is an Allium to suite
every situation and flowering season.
A. cyaneum - A delightful miniature forming tidy clumps of grassy foliage and nice cobalt-blue flowers in mid to late summer. China 5" x 4" Sun, Part Shade $code A (Photo)
A. senescens glaucum - A very nice dwarf form with swirling silver-gray foliage and short stems of light pink flowers. Europe to Siberia 2”(5”) x 5” Sun, Part Shade $code A (Photo)
ALOINANTHUS - (Aizoaceae) This newly created 'Genus' contains complex hybrids between the South African species of Aloinopsis and Nananthus and have been selected for their unique flower colors. They are not reliably hardy here in zone 5 but will survive some winters in warmer microclimates. They are best planted among rocks with a southern exposure.
A. x ‘Morning Sky’ - A selection with flowers that open yellow and then age to dark orange with a blue-pink wash at the tip of each petal. 2” x 4” Sun, Xeric $code A* (Photo)
A. x ‘Last Light’ - Yet another selection with flowers that are dark red-orange with an electric blue-pink wash in the center of the flower and at the tip of each petal. 2” x 4” Sun, Xeric $code A* (Photo)
A. x ‘Opera Mauve’ - This selection sports attractive opera mauve (yes this is a real color) flowers that do not change color as they age. A very good performer! 2” x 4” Sun $code A* (Photo)
A. x 'Peachy Keen' - A very floriferous hybrid with light peach colored flowers that turn a little darker as they age. 2" x 4" Sun $code A* (Photo)
A. x ’Sunscapes Pink’ - A selection with glowing, deep pink flowers. 2” x 4” Sun $code A* (Photo)
A. x ’Yellow Eye’ - Pink with shades of electric blue and orange and a light yellow center. 2” x 4” Sun, Xeric $code A* (Photo)
ALOINOPSIS - (Aizoaceae) An outstanding group of succulent plants from South Africa. All form caespitose clumps of thick succulent leaves and produce spectacular floral displays from yellow to various shades of red and magenta. The rosettes of leaves sit atop a large carrot-like root that must be protected from excessive moisture. This can often be accomplished by planting in rock crevices or walls. These plants are not reliably hardy in zone 5 but will survive some winters in warm microclimates.
A. 'Orange Rush' - Similar in color to Aloinopsis x 'Thai Dyed' but a more intense shade of orange. 1" x 4" $code A* (Photo)
AMSONIA - (Apocynaceae) A small group of perennial herbs native to North America and Eastern Asia. The tall stems are covered with attractive narrow foliage and clusters of star-shaped flowers are produced at the apex of each stem. Most are quite drought tolerant and of easy culture.
A. jonesii (Colorado Desert Blue Star) - This widely adaptable western native will thrive in ordinary garden conditions or the xeriscape. Sapphire blue stars from April to early summer. Autumn foliage is a beautiful clear yellow. A Plant Select® Recommendation for 2011 15” x 15” Sun, Xeric $code A (Photo)
A. peeblesii - Numerous stems of narrow green leaves and apical clusters of blue buds that open into attractive white flowers. Coconino Co., AZ 12" x 10" Sun $code A (Photo)
ARENARIA - (Caryophyllaceae) Often referred to as ’Sandworts’, this genus contains numerous dwarf, drought tolerant species that form attractive buns or mats of spiny congested foliage. Most are small and are best suited to troughs or small rock gardens.
A. obtusifolia - NEW Caespitose, flat mats of needle-like foliage covered in early summer with attractive white flowers on short stems. Sheridan Co., WY 1"(2") x 6" Sun, Alpine $code A (Photo)
A. hookeri v. desertorum - Forms extremely tight low buns of very small green needle-like foliage. The buns are covered with short stems of small white flowers in early summer. Well suited for a small rock garden or sunny trough. Uintah Co., UT 1”(2”) x 4” Sun, Trough $code A (Photo)
A. 'Wallowa Mountain' - An excellent groundcover with very short and compact bright green foliage that resembles moss yet is very drought-tolerant. Superb for xeric and fairy gardens, permanent containers, and between paving stones in paths and on patios. A Plant Select® Introduction for 2015. 1" x 24" Sun, Part Shade, Xeric $code A* (Photo)
ARCTOTIS adpressa - (Asteraceae) Rosettes of succulent, iridescent silver foliage adorned in early spring with 3” white daisies with peach and maroon reverses. This gem thrives in ordinary garden conditions and forms spectacular 12” to 15” mats. A beautiful foliage plant when not in flower. Very cold hardy but does not do well in hot dry situations. South Africa 2”(5”) x 12” Sun, Part Shade $code A (Photo)
ASTRAGALUS - (Fabaceae) This genus has some of the showiest flowers in the pea family, combined with attractive foliage cushions and interesting seed pods. Most are very tough and can withstand poor soil, full sun and xeric conditions.
A. angustifolius - An outstanding species that forms impressive compact mounds of silver-gray pinnate foliage covered with white flowers in late spring. Easily grown Romania 6” x 12” Sun, Xeric $code A* (Photo)
A. ceramicus - RENEW Sparse, wire-like foliage produces light pink flowers that are followed by attractive clusters of red-mottled birds’ eggs-like seed pods. Ferris Dunes, WY 3” x 6” Sun, Xeric $code A* (Photo)
A. chloodes - RENEW This unique Utah native has the longest, narrowest leaves in the genus. The clumps resemble very stiff, silvery-green grass with several loose racemes of magenta flowers produced in late spring. 6” x 6” Sun, Xeric $code A* (Photo)A. desperatus - RENEW Silver pinnate foliage and nice spikes of purple. Very cute! San Juan Co., UT 3” x 3” Sun, Xeric $code A* (Photo)
A. detritalis - One of the best! Attractive tufts of linear, silver leaves topped with racemes of bright magenta flowers. A native from the prairies and foothills of western Utah. 2”(3”) x 4” Sun, Xeric $code A (Photo)
A. iodopetalus - NEW Attractive clumps of arching, pinnate foliage and lavender flowers with a prominent white blotch on the banner. Archuleta Co., CO 2" x 6" Sun, Xeric $code A*
A. megacarpus - RENEW Erect dark-green pinnate foliage with small pink flowers that seem to develop overnight into giant red-mottled seed pods (up to 4”). One of the most interesting Astragali. 4” x 6” Sun, Xeric $code A* (Photo)
A. purshii - A beautiful Utah native which forms compact tufts of silvery-green foliage and 1” pink-purple flowers. The flowers are followed by decorative white fuzzy seed pods. 2” x 4” Sun, Xeric $code A* (Photo)
A. amphioxys 'San Felipe'- A gorgeous species found growing near the San Felipe Indian Pueblo south of Santa Fe, NM. The large pads of attractive silver foliage are covered with large dark pink flowers in early spring. Outstanding! 4" x 10" Sun, Xeric $code A (Photo)
A. utahensis - A very distinctive Astragalus with light gray pubescent leaves and large luminescent pink flowers. 2” x 6” Sun, Xeric $code A* (Photo)
BERGERANTHUS - (Aizoaceae) A small genus of succulent plants native to South Africa. A number of the species grow at high elevation and have proven to be quite cold hardy.
- A very hardy South African succulent with
attractive dark green clumps of three-sided leaves and large yellow flowers with
many narrow petals.
2” x 5” Sun, Xeric $code A (Photo)
BUKINICZIA cabulica - (Plumbaginaceae) Blue-green rosettes with unusual mottled leaves. Outstanding foliage plant with pink flowers the second year. Reseeds nicely. Pakistan 1"(6") x 6" Sun, Biennial $code A (Photo)
CALANDRINIA - (Portulacaceae) A large genus of annual and perennial herbs mostly native to western North and South America. The stems and/or foliage are succulent and the very brightly colored short-lived flowers are produce in continuing succession over the flowering season.
C. umbellata - Stunning neon-magenta flowers on linear, slightly hairy foliage. Peru 3"(6") x 6" Sun $code A (Photo)
CALYLOPHUS serrulatus - (Onagraceae) From the Evening Primrose family, this day bloomer forms tufts of gray-green foliage on a miniature shrub with yellow tubular flowers all summer. 6" x 8" Sun, Xeric $code A (Photo)
CAMPANULA - (Campanulaceae) The bellflowers are numerous and varied, providing species for a variety of settings and exposures. Some of the species are particularly useful as wall plants and will flourish in the tiniest crevice. They are generally easy to cultivate and will provide good color throughout the growing season.
C. ardonensis (syn. C. bellidifolia) - NEW Rosettes of green linear-spathulate foliage adorned with stems of attractive violet flowers on tall stems Caucases 2"(5") x 4" Sun, Part Shade $code A (Photo)
C. incurva - A spectacular monocarp from northern Greece forming large mounds of pubescent, gray-green, serrated leaves and large upward-facing white to light purple bells. Adaptable to a variety of habitats. 3” (8”) x 8” Sun, Part Shade $code A (Photo)
C. topaliana - A ground hugging mat of pubescent, gray-green leaves
studded with light blue flowers from early summer to frost. Makes a spectacular
wall plant with stems clasping the rocks like a giant spider. 2” x 8” Sun,
Crevice/Wall $code A
C. trogerae - One of the best! Nice clumps of gray-green leaves and beautiful 2"-3" white flowers with exerted pistils. Turkey 3"(4") x 6" Sun, Part Shade $code A* (Photo)
CASTILLEJA - (Scrophulariaceae) A large group of perennial herbs found mostly in North and South America. Most species seem to form a symbiotic relationship with other plants and, therefore, they should be planted with other natives. Native grasses, Penstemons and Artemisias (particularly A. frigida) have proven successful.
C. scabrida - Dwarf clumps of gray-green, incised foliage and spectacular spikes of crimson flowers. San Miguel Co., CO 2"(4") x 4" Sun $code A* (Photo)
CERCOCARPUS - (Rosaceae) The ‘Mountain Mahoganies’ are evergreen shrubs that grow throughout the Rocky Mountain West, often found on open, rocky slopes. In summer, insignificant flowers appear, followed by feathery tailed seeds. Very hardy and useful structure plants for the garden.
C. intricatus (Little Leaf Mountain Mahogany) - Dense erect evergreen shrub with small dark-green linear leaves and contrasting gray stems. Makes a very striking vertical structure element in the xeric garden. A Plant Select® Recommendation for 2009. 8' x 4' Sun, Xeric $code A (Photo)
CHAENORRHINUM glareosum - (Scrophulariaceae) RENEW Tight mats of small green leaves studded with violet-lilac flowers with yellow throats. Good wall, trough and crevice plant. Southern Spain 2” x 8” Sun $code A (Photo)
CLEMATIS - (Ranunculaceae) This large group of vines and
shrubby plants is found growing in temperate regions throughout the world and
has been frequently hybridized to produce a variety of brightly colored
cultivars. The shrubby non-vining species and cultivars are good choices
for the rockery or rock garden.
C. fruticosa 'Mongolian Gold' - This unique species is an erect, woody shrub that is covered with yellow flowers in summer followed with attractive seed heads in late summer and fall. Originally collected by the Great Plants™ group in Northern Inner Mongolia. A 1999 Great Plants® selection. 36" x 36" Sun $ code A* (Photo)
C. integrifolia 'Psarlan' (MONGOLIAN BELLS® Clematis) - This compact, almost ground-covering race of Clematis integrifolia blooms from spring to fall, with nodding, leathery four-parted flowers in blue, lavender, pink and pure white. It appears to have greater drought tolerance than typical clematis. A Plant Select® Introduction for 2008. 12” x 14’ Sun, Part Shade $code A* (Photo)
C. scottii (SCOTT’S SUGARBOWLS) - Mounds of blue-green, lacy foliage topped with large, nodding blue flowers in late spring and early summer. Shimmering golden seed heads follow suit. A Plant Select® Petites Recommendation for 2013. 6”(12”) x 15” Sun $code A* (Photo)
CONVOLVULUS - (Convolvulaceae)
A genus containing some of the most coveted as well as some of the most hated
plants (bindweed) in the garden. Fortunately, we offer only the former - tight
mats of non-invasive foliage and attractive flowers.
C. compactus - Congested mats of shimmering silver foliage and sessile white flowers. Superb! Turkey 2” x 8” Sun $code A* (Photo)
A large genus of small, ball-shaped cacti found growing from British Columbia
and southern Canada, throughout the United States and into southern Mexico.
They generally have attractive spination and often large showy flowers. A
number of species, including those listed below, have demonstrated excellent
cold tolerance and make excellent rock garden subjects as well as useful trough
C. echinus - A exciting new addition from west Texas! Forms mostly solitary stems 3”- 4” in diameter covered with thick white spines. Produces large yellow flowers with a red center. 4” x 3” Sun, Xeric $code A* (Photo)
C. hesteri - A small
clump-forming species with attractive red and brown spines and showy light
purple flowers. Texas 2" x 2" Sun, Xeric $code A*
CRYPTANTHA - (Boraginaceae) A genus of plants well represented in western North America and generally found growing in harsh, dry situations. They are challenge to cultivate in the garden, requiring xeric conditions and strong light. The smaller species have proven to make good trough specimens.
C. caespitosa - RENEW Tight domes of felted, silver-gray foliage and short stems of white androsace-like flowers with yellow centers. This xerophyte is difficult to grow in the open garden but performs well in a dry trough. Fremont Co., WY 1”(3”) x 8” Sun, Xeric, Trough $code A* (Photo)
C. humilis v. nana - Compact buns of silver-gray, tomentose foliage covered with very attractive, nearly caespitose, white flowers with bright yellow centers in early spring. An excellent trough specimen. Montrose Co., CO 2" x 4" Sun, Xeric, Trough $code A* (Photo)
DAPHNE - (Thymeliaceae) A genus of evergreen
flowering shrubs that contains some of the most desirable plants for the rock
garden. They are notoriously difficult to produce and do not thrive in pots.
Small plants transplant more reliably, so purchasing more expensive large plants
is usually a mistake. Always plant in well drained soil in full to part shade.
Once established, they are quite drought tolerant so do not over water. All of
our plants have been grown using the biological fungicide Rootshield to help
protect the roots from fungal attack.
D. arbuscula ‘Muran Pinnacle’ - A great miniature form of the species with dark green foliage and dark pink flowers. 4” x 6” Sun, Part Shade, Trough $code A** (Photo)
D. jasminea - A species native to Greece, this Delphi form produces a tightly packed, well branched shrub with small bluish-green leaves. Terminal pairs of white flowers emerge from rosy-purple buds in mid-June and a succession of axillary flowering continues into fall. 4” x 10” Sun, Part Shade $code A** (Photo)
D. juliae - A fantastic species forming mounds of numerous thin stems of dark green foliage and covered in spring with strongly scented, bright pink flowers. Russia 6” x 12” Sun, Part Shade $code A** (Photo)
D. x ‘Maisy Larae’ - This hybrid (D. circassica x D. arbuscula) comes through Rick Lupp at Mt. Tahoma Nursery. This cultivar forms small compact domes of narrow, dark green foliage and produces large, fragrant, rosy-purple flowers. 6” x 10” Sun, Part Shade $code A** (Photo)
D. x napolitana ‘Bramdean’ - This cross (D. collina of gardens x D. cneorum v. pygmaea) forms a low, evergreen mound of light green, glossy leaves adorned with terminal clusters of rose-pink fragrant flowers. 8” x 12” Sun, Part Shade $code A** (Photo)
D. x schlyteri 'Money-Coutts' - One of the most reliable dwarf cultivars originally grown by Money-Coutts Nursery. This outstanding cultivar forms dense mounds of narrow, dark green foliage and deep pink-purple flowers produced in spring and again in fall. A real winner! 6” x 12” Sun, Part Shade $code A** (Photo)
D. x susannae 'Anton Fahndrich' - This outstanding compact selection forms dense mounds of dark evergreen foliage covered with fragrant lavender-pink flowers in spring or early summer. Turkey 12” x 24” Sun, Part Shade $code A** (Photo)
D. x susannae 'Lawrence Crocker' - One of the best and easiest of the small hybrids. A cross between D. arbuscula and D. collina, forming a dense mound of evergreen foliage covered in spring with fragrant lavender-pink flowers. Sporadic flowering continues throughout summer into fall. 12” x 24” Sun, Part Shade $code A** (Photo)
DEGENIA velebitica - (Brassicaceae ) Tufts of linear, silver leaves with short stems of large bright yellow flowers followed by inflated seed pods. A monotypic genus endemic to the Velebit Mountain in Croatia; the image of this species can be found on the reverse of the Croatian 50 lipa coin. 2"(3") x 4" Sun, Part Shade $code A* (Photo)
DELOSPERMA - (Aizoaceae) A large genus of succulent plants native to South Africa. Most are not winter-hardy but there are high altitude species that will thrive in cold climates. A number of these species have been introduced into cultivation by our good friend Panayoti Kelaidis of the Denver Botanic Gardens. They all have beautiful flowers and interesting succulent foliage.
D. 'Alan's Apricot' PPAF (Alan's Apricot
ice plant) - A superior form with large 2" flowers covering the foliage
nearly all summer long. Flower color changes seasonally from a true
orangey-apricot to soft orangey-pink. Brought to Plant Select® by Alan Tower,
Spokane, WA. The hardiest and longest-blooming of the Plant Select® ice
plants. A Plant Select® Introduction for 2016.
D. 'Blut' - A superb new ice plant originally discovered by Nurseryman Kelly Grummons, owner of Timberline Nursery in Arvada, CO. The mat of deep green evergreen foliage is covered with magenta-red flowers in spring and sporadically throughout the season. 2" x 36" Sun $code A (Photo)
D. carterae 'Carlile Pink' - A cute little species with light green succulent foliage and delicate light pink flowers with dark pink centers. This plant appeared in the garden and it’s origin is unknown. 1" x 5" Sun $code A (Photo)
D. cooperi ‘Select Dwarf’ - A smaller version of the common D. cooperi but this one seems to be one zone hardier. This cultivar has proven to be one of the best spreaders, covering large areas over time, and the foliage remains attractive throughout the winter. 1"(2") x 36" Sun $code A (Photo)
D. dyeri 'Psdold' (RED MOUNTAIN® ice plant) - A new hardy ice plant from the mountains of South Africa. The congested mats of dark green foliage are studded with spectacular dark orange-red flowers from spring to fall. More drought and heat tolerant than many of the alpine ice plants. A Plant Select® Introduction for 2007. 1" x 8" Sun $code A* (Photo)
D. 'P001S' (FIRE SPINNER® ice plant) - This new introduction forms fast spreading carpets of green-apple foliage that keeps its shiny presence through winter. The flowers are massed in spring, but reappear periodically through summer. The purple and orange flowers represent a dramatic color breakthrough for the hardy ice plants. A Plant Select® Introduction for 2012. 2" x 18" Sun, Part Shade $code A* (Photo)
D. 'Psfav' (Lavender Ice ice plant) - We are proud to offer this exciting new ice plant selection that was discovered by our good friends at Perennial Favorites Nursery. Similar in foliage and habit to D. Table Mountain® but with stunning lavender flowers. To date it has demonstrated excellent cold and drought tolerance. A real winner! A Plant Select® Introduction for 2009. 2” x 36” Sun $code A* (Photo)
D. 'PWWG02S' (RED MOUNTAIN® FLAME ice
plant) - A new hybrid selection of South African ice plant with small
succulent evergreen leaves and large blazing red-orange flowers in late spring
and early summer. This tough, vigorous cold-hardy selection was made by David
Salman of Waterwise Gardening. A Plant Select® Introduction for
2016. 2" x 24" Sun, Part Shade $code A*
D. sp. ‘Lesotho Pink’ - An exciting new introduction first offered by High Country Gardens. Forms very compact mats of dark green, evergreen foliage covered from early to mid spring with large, deep pink flowers. Excellent cold hardiness. Lesotho 1” x 18” Sun, Part Shade $code A* (Photo)
D. 'John Proffitt' (TABLE MOUNTAIN® ice plant) - This ice plant is destined to become one of the greats! An outstanding ground cover with dark green wedge-shaped leaves that are covered throughout the growing season with lustrous, fuchsia flowers. Hardier than D. cooperi, the leaves remain turgid and green, often tinged with purple, throughout the winter. Don’t be without this one! A Plant Select® Introduction for 2002. 2” x 36” Sun $code A* (Photo)
DIANTHUS - (Caryophyllaceae) An indispensable group of plants that are easily grown and provide outstanding color and texture in the garden. There are all sizes and shapes but we are particularly fond of the smaller bun-forming species that fit well into the smaller rock garden or trough. No garden should be without them.
D. x ’Sunscapes Pink ’
- After additional study and
observation, we have come to the conclusion that what we have been offering as
D. freynii is more likely a D. gratianopolitanus hybrid. Although the name may have changed, the plant has not and it remains a
stunner - mats of gray-green foliage and nice aromatic pink flowers in
profusion. Easy and attractive. 3”(5”) x 12” Sun $code A
DIGITALIS – (Scrophulariaceae) A group of summer flowering perennial and biennial herbs native to Europe and northwest Africa to central Asia. Most have large penstemon-like flowers and are easily grown.
D. mariane - One of the best Digitalis for the rock garden! Nearly prostrate dark green rosettes arise from a perennial crown and produce strong 12” stems of glorious, large, reddish-purple flowers. Similar to D. purpurea but not as fussy. 3”(12”) x 10” Sun, Part Shade $code A (Photo)
D. obscura (SUNSET® Foxglove) - A dwarf selection of this sub shrub, with evergreen, willow-like foliage set off by burnt sienna-colored trumpet shaped flowers. Attractive in and out of flower. A Plant Select® Recommendation for 2004. 10”(14”) x 15” Sun, Part Shade $code A* (Photo)
DRABA - (Brassicaceae) A large group of bun forming plants with yellow or white crucifer flowers. With a few exceptions, all are easy to grow. They are among the earliest to flower, marking the beginning of early spring activity in the garden.
D. imbricata - Buns of compact foliage adorned with scapes of bright yellow flowers. Caucasus 1”(2”) x 4” Sun, Alpine $code A* (Photo)
D. parnassica - Small cushions of attractive, hairy, green foliage and short stems of bright yellow flowers in early spring. A nice addition to a sunny trough. Parnass Mtns., Greece 1"(2") x 3" Sun, Part Shade $code A (Photo)
D. rigida ssp. bryoides - One of the tightest buns in the genus with dark green incurved leaves and short stems of bright yellow flowers. Caucasus 2”(4”) x 4” Sun, Part Shade $code A (Photo)
D. zapateri (syn. D. dedeana) - NEW Cushions of attractive , bright green, ciliated foliage and pure white flowers on short stems. One of the best white flowering species. Mountains of northern and eastern Spain 2"(3") x 5" Sun, Part Shade $code A (Photo)
DRACOCEPHALUM paulsenii - (Lamiaceae) NEW Small prostrate mats of gray-green crenate foliage adorned with racemes of purple flowers. An outstanding species for troughs and crevice gardens. Tajikistan, Koitezek Pass, Pamir 1" x 6" Sun, Part Shade $code A* (Photo)
EBRACTEOLA wilmaniae - (Aizoaceae) An outstanding South African succulent forming compact highly branched rosettes of trigonus gray-green leaves. The white to dark-pink flowers appear in early spring and flowering continues sporadically throughout the growing season. A slow growing mat will form with age. This species has proven to be reliably winter hardy for us. North Cape Province, SA 2” x 4” Sun $code A* (Photo)
ECHINOCEREUS - (Cactaceae) A large group of heavily-spined cacti often called ‘Hedgehog Cactus’. Within this genus are many of the most winter hardy cacti. Most have extremely large showy flowers that appear in early summer and all are easily grown if given full sun and well drained soil.
E. fendleri v. kuenzleri - Clusters of dark-green stems with areoles containing three to four stout radial spines and usually one central spine. The large magenta flowers appear in mid-summer and are followed by burgundy-red fruits. 5” x 3” Sun, Xeric $code A* (Photo)
E. reichenbachii v. albispinus -
Clumping barrels covered
with dense white spines adorned with pale pink flowers. 3" x 2" Sun, Xeric
$code A* (Photo)
E. reichenbachii v. caespitosus - Single, mushroom-shaped stems with chalky-white radial spines and no centrals. The large flowers are light pink with a white center. Easy to grow and very hardy. Kimble Co., TX 5" x 3" Sun, Xeric $code A* (Photo)
E. triglochidiatus v. gonacanthus -
Robust green stems with 5-8 ribs armed with heavy tan and gray-brown spines.
The stems offset forming a mound of branching stems 12"-18" in diameter in time.
Magnificent scarlet-red flowers with green stigmas erupt from the mounds in
early summer. Sun, Xeric $code A*
ECHINACEA tennesseensis (Tennessee Purple Coneflower) - (Asteracea) This American coneflower, once endangered in the wild, produces beautiful purple-pink flowers during the summer, always facing east so be sure to site properly. A Plant Select® Recommendation for 2013. 7"(15") x 14" Sun, Part Shade $code A* (Photo)
ECHIUM amoenum 'Compact Form' (Red Feathers)- (Boraginaceae) A compact, columnar borage from the Caucasus that looks for all purposes like a spring blooming Liatris that’s gone rusty. The dark reddish-brown flowers are attractive and the plant will re-bloom if deadheaded. A Plant Select® Recommendation for 2010. 4”(10” ) x 4” Sun $code A* (Photo)
EDRAIANTHUS - (Campanulaceae) A very useful and attractive group of Mediterranean plants with grass-like foliage and clusters of up-facing bell flowers. They thrive in sunny locations and are particularly effective in walls and crevices.
E. pumilio - Mounds of slender, rigid, blue-green leaves covered in spring with
caespitose, upward facing, blue bell flowers. Very showy and particularly well suited for
walls and crevices. 2" x 6” Sun, Part Shade $code A
E. wettsteinii - Loose cushions of green, linear foliage and 3" scapes of attractive blue flowers. Prokletije Mtns., Albania 2"(4") x 6" Sun, Part Shade, $code A (Photo)
EPITHELANTHA micromeris - (Cactaceae) A very choice cactus with tiny appressed white spines covering the plant. Small salmon flowers emerge from the top of the plant in spring, followed by very decorative long, bright red fruits. From the northernmost population in New Mexico. Cannot reliably be wintered outside in Zone 5. 2” x 1” Sun, Xeric $code A* (Photo)
peristenia (Englemann's Daisy) - (Asteracea) An
incredibly tough and adaptable perennial wildflower of the Southern Great
Plains. Rosettes of crisp, ruffled gray foliage are adorned nearly all summer
with stems of bright yellow daisies. A Plant Select® Recommendation for
2015. 24" x 14" Sun, Part Shade $code A* (Photo)
ERIGERON - (Asteracea) A vast and variable race of composites many of which make good garden subjects. Most are easy to grow and can be used in a variety of garden situations from the open garden to walls and crevices.
E. compactus v.
compactus - Compact
cushions of tiny gray-green leaves and stems of attractive white flowers in
spring. One of the most compact Erigerons and an excellent trough plant.
1”(3”) x 4” Sun, Trough $code A (Photo)
E. compactus v. consimilis - Dense pulvinate cushions of short, linear, gray-green leaves and large white flowers that age to pale lavender. A choice Great Basin native requiring excellent drainage and protection from excess winter moisture. Outstanding! 2”(4”) x 6” Sun, Xeric $code A (Photo)
E. compositus ‘Red Desert’ - This very dwarf form was found growing in rock crevices near Baggs, Wyoming. Very condensed foliage and white flowers on short stems. Great for walls and crevices! 1”(2”) x 6” Sun $code A (Photo)
E. scopulinis - Dense mats of small, shiny dark green leaves and cute little white flowers on 1/2" stems in spring. Good for troughs and between rocks. 1"(1.5") x 12" Sun, Part Shade $code A (Photo)
E. uncialis - Minute tufts of linear-spatulate leaves adorned with cute white flowers. An excellent plant for a sunny trough. 1”(1.5”) x 3” Sun $code A (Photo)
ERIOGONUM - (Polygonaceae) The ‘buckwheats’or ‘sulphur flowers’ are a dominant presence on the prairies and mountain screes of the West. They come in an amazing array of forms and colors, from tiny mat formers and mini-shrubs, to fantastic mounds of silver tomentose leaves that erupt into dense domes of ‘chicken wire’ covered with tiny flowers.
E. cespitosum - A highly desirable species forming tight caespitose mats of gray-green tomentose leaves and short-stemmed pom-poms of white and pink flowers. Requires xeric treatment. 1” x 5” Sun, Xeric $code A* (Photo)
E. compositum - NEW Rosettes of lanceolate, tomentose foliage produce stout stems bearing umbells of attractive yellow flowers. 3"(8") x 8" Sun, Xeric $code A* (Photo)
E. corymbosum v. orbiculatum - A large shrubby species forming congested mounds of woody stems covered with attractive broadly ovate gray-green foliage. The mounds are adorned in late summer and fall with compact, flat-topped corymbs of attractive white flowers. Mokee Dugway, UT 30" x 30" Sun, Xeric $code A* (Photo)
E. corymbosum v. velutinum - A large shrubby species forming loose mounds of woody stems with oblong greenish-gray foliage. The mounds are covered in late summer and fall with loose corymbs of attractive white flowers. Farmington, NM 30" x 30" Sun, Xeric $code A* (Photo)
E. douglasii v. douglasii - RENEW Compact spreading cushions of spatulate, silvery white leaves and short-stemmed inflorescences with capitate golden yellow flowers. 2” (4”) x 6” Sun, Xeric $code A*E. pulchrum - A perfect tiny shrub with clouds of pure white, ivory or pink flowers in late summer and autumn. 5”(8”) x 8” Sun, Xeric $code A* (Photo)
E. ovalifolium v. focarium - A rare and unique species found only growing in the fields of volcanic cinders at Craters-of-the Moon National Park, Idaho. Attractive mats of round, white tomentose foliage and stems of yellowish white flowers aging to pale pink. 2"(5") x 6" Sun, Xeric $code A* (Photo)
E. ovalifolium v. nivale - NEW Attractive compact mats of oval grey-tomentose foliage adorned with stems of white flowers that change to deep pink as they age. Frog Lake, CA 2"(4") x 6" Sun, Alpine $code A* (Photo)
E. ovalifolium v. nivale - NEW Attractive compact mats of oval grey-tomentose foliage adorned with stems of white flowers that change to deep pink as they age. This form is from a lower elevation and is not quite as compact as the alpine forms. Mt. Rose, Washoe Co., NV 2"(4") x 6" Sun $code A* (Photo)
E. pauciflora v. gnaphalodes - NEW Loose mats of tomentose, silver-white foliage and short stems of capitate whitish brown to rose flowers. ex Pawnee Buttes, Weld Co., CO 2”(4”) x 6” Sun, Xeric $code A* (Photo)
E. umbellatum v. aureum 'Psdowns' (KANNAH CREEK® Buckwheat) - An excellent garden plant that seems to be more moisture tolerant than most. The spreading green foliage changes to vivid purple-red in winter and masses of yellow flowers appear from May to July, turning orange as they age. Plant Select® Introduction for 2007. W. United States 8”(12”) x 20” Sun $code A* (Photo)
E. umbellatum v. dumosum - NEW Mats
of small oval leaves, densely tomentose on both surfaces and bright yellow
flowers with crimson streaks. Siskiyou Co., CA 6" x 8" Sun,
Xeric $code A*
E. umbellatum v. nevadense - Spreading mats of gray felted, oval leaves with bright chrome yellow umbels that age to deep rusty reds. Frog Lake, CA 4"(8") x 10" Sun, Xeric $code A* (Photo)
ESCOBARIA - (Cactaceae) A North American genus of solitary
to clump-forming, globular cacti with a number of reliably cold-hardy
species. The apical flowers appear in early summer.
E. orcuttii v. koenigii - A very attractive clump-forming species covered completely with short white spines. Small salmon-pink flowers in early summer. Very hardy. 4" x 6" Sun, Xeric $code A* (Photo)
E. sneedii v. leeii - Small clumps with short white spines and small salmon-pink flowers in early summer. Very hardy and one of the best species for trough culture. 2" x 4" Sun, Xeric, Trough $code A* (Photo)
E. vivipara v. buoflama - Globes of densely interwoven white spines with dark brown tips. Attractive flowers that vary from yellow to peach to pink. 3” x 3” Sun, Xeric $code A* (Photo)
GAZANIA - (Asteraceae) A very familiar group of composites found frequently in garden centers and , in colder climates, used as annuals. However, the species offered here are hardy South Africans that work well in perennial plantings and rock gardens.
G. krebsiana (TANAGER® gazania) - Fluorescent orange daisies from earliest spring to late autumn create dazzling specimens ideal for mass displays. Glossy, dark green leaves develop a deep purple tinge in the winter months. Reseeds moderately in zone 5 and is hardy in protected microclimates. Native to South African and a Plant Select® Recommendation for 2003. 2”(4”) x 10” Sun, Part Shade $code A (Photo)
G . linearis 'P004S' (COLORADO GOLD® gazania) - Glossy mounds of deep green, strap-shaped leaves that are spangled with 3” shiny yellow flowers with patterned centers. Flowering is most prolific in spring and fall but continues throughout the growing season. This selection is reliably hardy in zones 4 - 8 (up to 9,000’). This plant was chosen as a Plant Select® Introduction for 1998. 4”(6”) x 10” Sun, Part Shade $code A (Photo)
GERANIUM dalmaticum (Dalmatian Pink Cranesbill) - A low-growing diminutive perennial with dainty cleft, aromatic glossy green leaves that turn red in the fall. The mats are covered with clear pink flowers from late spring to early summer. A Plant Select® Petites Recommendation for 2014. 4" x 10" Sun, Part Shade $code A (Photo)
GLAUCIUM - (Papaveraceae) Members of this Mediterranean genus are known
as ‘horned poppies’ because of the horn-like seed pods that form after
flowering. Most species have very attractive incised, tomentose, silver foliage
attractive flowers. Most are very drought tolerant.
G. acutidentatum - An outstanding species that forms compact mounds of attractive , tomentose silver foliage and a profusion of deep orange flowers with black throats. The flowers are followed by the characteristic horn-like seed pods. Difficult to propagate, so seldom offered. Can be easily deadheaded after flowering to control naturalization. Turkey 10”(20”) x 20” Sun, Xeric $code A* (Photo)
GRASSES (ORNAMENTAL) - There are many species of ornamental grass that are of great use in the garden and landscape, providing texture and structure in all seasons. Most of the species we list can be used effectively in the rockery. All will grow in average garden conditions.
Bouteloua gracilis 'Blonde Ambition' 'PP 22,048 - An impressive, highly ornamental form of Western native grass with tall, upright stems. Showy chartreuse, aging-to-blonde seed heads hold their straight shape and are displayed high above the foliage through winter, providing many months of color and texture. Developed by High Country Gardens. A Plant Select® Introduction for 2011. 30" x 30" Sun, Partial Shade $code A* (Photo)
Calamagrostis brachytricha (Korean Feather Reed Grass) - A nice clump-forming grass with narrow arching foliage and very attractive straw colored seed heads. This species flowers in early fall and will perform in slightly shaded exposures. A Plant Select® Recommendation for 2009. 24"(36") x 15" Sun, Part Shade $code A (Photo)
Muhlenbergia reverchonii 'PUND01S' (UNDAUNTED® Ruby Muhly) - Native to a small area in north Texas, this medium sized grass explodes into a profusion of tiny reddish-pink seed heads floating above thin, mid-green foliage. Flowering in early fall, this grass is resistant to deer browsing. A Plant Select® Recommendation for 2014. 30" x 20" Sun $code A* (Photo)
Sporobolus wrightii (Giant Sacaton) - A wonderful southwestern alternative to Pampas grass. This species develops into a fountain of luxuriant foliage that explodes with fine-textured seed heads in late summer. A Plant Select® Recommendation for 2006. 6’ x 4’ Sun, Part Shade $code A* (Photo)
HESPERALOE parviflora (Red Yucca) - (Agavaceae) You will find this Agave relative in use
extensively as a landscape plant in Phoenix, AZ and other mild climates, but it
has proven perfectly hardy for us here in Colorado. Absolutely no winter damage,
so the plants develop into attractive specimens. Produces tall spikes of
beautiful coral-red flowers that last throughout the summer. A Plant Select®
Recommendation for 2010. 18”(36”) x 18” Sun $code A
HETEROTHECA jonesii - (Asteraceae) Flat mats of gray-green leaves studded with bright yellow daisies from spring to frost. Will grow in xeric conditions, but performs better if given some moisture and good drainage. Southern UT 1” x 10” Sun, Xeric $code A* (Photo)
HETEROTHECA jonesii x villosa 'Goldhill' (Goldhill Golden-Aster) - Tufted grey "scatter rugs" of fuzzy foliage make dense mounds in a sunny garden. The mounds are clothed with cheerful yellow daisies from late winter to fall. This natural hybrid combines the dense habit of its rare parent H. jonesii with the vigor of the more common H. villosa. 'Goldhill' is apparently sterile so won't seed around like its common parent. Prefers well drained soil. A Plant Select® Petites Introduction for 2015 3" x 8" Sun $code A* (Photo)
HEUCHERA - (Saxifragaceae) A large genus of perennial herbs mostly from western North America. The rhizomatous roots are covered with attractive tufts of rounded-cordate foliage and the flowers are born on tall, slender stems. There are a multitude of fancy hybrids on the market today, but the natives are better suited for the rock garden. Most are quite drought tolerant.
H. abramsii - A choice dwarf Heuchera from the San Gabriel Mountains of California. Attractive clumps of glossy green foliage adorned with clouds of nice light pink flowers. 3"(6") x 6" Sun, Part Shade $code A (Photo)
H. pulchella (SANDIA CORALBELLS) - Attractive mats of dark green foliage adorned with short spikes of pink to burgundy, hairy bells. A Plant Select® Petites Recommendation for 2013. Bernalillo Co., NM 3"(6") x 8" Sun, Part Shade $code A* (Photo)
HIERACIUM - (Asteraceae) A mostly North American genus containing a large number of species with attractive rosettes and, in most cases, yellow flowers. Commonly called 'hawkweeds', they are easily cultivated, thriving in sunny situations in poor soil.
H. tardans - An outstanding species that forms tight mats of silver foliage with attractive yellow flowers on 3" stems. This is an aggressive ground cover that will perform in a variety of situations and spreads by rooting new rosettes each year, not by seed. The size of the mat can be controlled, if desired, by trimming off the new rosettes from the perimeter before they root in mid summer. Very much like a giant Antennaria. Outstanding! 2"(5") x 36" Sun, Part Shade $code A (Photo)
HORMINIUM pyrenaicum - (Lamiacea) NEW Rosettes of deep green, scalloped foliage produce stems of attractive violet flowers in mid to late summer. Pyrenees and Alps in Western Europe 4"(10") x 8" Sun, Part Shade $code A (Photo)
(Asteraceae) A large genus of yellow-flowered composites found on the prairies
and extending in range to the alpine tundra. Most are too large and course for
the rock garden but there are also some real gems that no garden should be
H. acaulis ssp caespitosa - An outstanding dwarf alpine for the rock garden or trough! Condensed buns of silver-tomentose leaves produce many short-stemmed yellow flowers in spring. This plant comes from the alpine screes of Pikes Peak in Colorado. 2”(4”) x 4” Sun, Alpine $code A* (Photo)
H. acaulis 'Las Vegas' - A dwarf form found near Las Vegas, NM with narrow silver foliage and yellow flowers on short stems. San Miguel Co., NM 1"(2") x 3" Sun, Xeric $code A* (Photo)
INULA rhizocephala - (Asteraceae) NEW Distinctive flat rosettes of obovate leaves with broad, flattened stalks. The yellow flowerheads are produced in a sessile, central cluster. Pakistan to Kashmir Sun 1" x 4" Sun $code A* (Photo)
INULA verbascifolia - (Asteraceae) Mounds of beautiful gray tomentose leaves with nice, short-rayed yellow flowers in summer. Very effective when planted in hot, sunny rock garden settings or hardscape crevices. 4”(6”) x 10” Sun $code A (Photo)
IRIS hookeri (Dwarf Beach-head Iris) - (Iridaceae) Tidy clumps of attractive green foliage framing large, porcelain-blue flowers in late spring and early summer. One of North America's most beautiful native irises, and provides foliage and textural accent for small gardens. A Plant Select® Petites Recommendation for 2014. 4"(7") 7" Sun, Part Shade $code A* (Photo)
JOVIBARBA heuffelii - (Crassulaceae) Very similar to Sempervivums
but unique in that they do not produce offsets on stolons but rather increase by
the existing rosettes dividing. They form tight clusters of colorful,
durable rosettes that will grow in brighter situations and seem to be less prone
to browsing by wildlife. The rosettes retain their attractive colors throughout
J. heuffelii 'Gold Bug' - Attractive green rosettes that turn golden-green in early spring. 2" x 1.5" Sun, Part Shade $code A (Photo)
J. heuffelii 'Giuseppi Spiny'- Brownish-red leaves with sharply pointed tips. Medium sizes rosettes 2" x 2" Sun, Part Shade $code A* (Photo)
J. heuffelii 'Hot Lips' - Dark purplish-red leaves with green bases and silver edges. 2" x 2" Sun, Part Shade $code A (Photo)
J. heuffelii 'Irene' - Burgundy-red rosettes with light yellow-green at the base and on new leaves. 2" x 3" Sun, Part Shade $code A*(Photo)
J. heuffelii 'Mystique' - Unusually short, wide, dark reddish-purple leaves forming medium sized rosettes. 2" x 3" Sun, Part Shade $code A* (Photo)
J. heuffelii 'Orion' - Soft gray-green leaves with a silver edges. 2" x 2" Sun, Part Shade $code A (Photo)
J. heuffelii 'Sun Dancer' - Pale
yellowish-green rosettes with leaves tips painted reddish-purple. 2" x 3" Sun,
Part Shade $code A
J. heuffelii 'Sylvan Memory' - Dark reddish-purple leaves with a silver edge. 2" x 2" Sun, Part Shade $code A (Photo)
J. heyffgelii 'Tan' - Attractive
bronze-red leaves with a touch of blue-green at the base. 2"x2" Sun, Part Shade
$code A* (Photo)
LALLEMANTIA canescens - (Lamiaceae) A very attractive mint from Iran, producing spikes of large blue flowers with white stripes over mats of gray-green foliage. 3”(8”) x 8” Sun $code A (Photo)
LESQUERELLA – (Brassicaceae) The members of this genus, often referred to as ‘bladder-pods’, form inflated, silvery-pubescent seed pods after flowering. All flower early in spring when very little else is in flower.
L. arizonica - Very tight gray mats covered with yellow blossoms in early spring. Coconino Co., AZ 2”(3") x 6" Sun, Xeric $code A (Photo)
L. sp. 'Penrose' - Similar to L. arizonica but larger in foliage and flower. Restricted to dry hillsides around Penrose, CO. 3"(5") x 8" Sun, Xeric $code A (Photo)L. subumbellata - Tiny silver gray tufts with short scapes of yellow flowers. Uintah Co., UT 1”(2”) x 2” Sun, Xeric $code A (Photo)
LEWISIA - (Portulacaceae)
This is the American ‘bitter-root’ genus, found in the mountains and valleys of
the US West. They grow in succulant rosettes over large fleshy roots and are
well worth growing for their lovely flowers and foliage.
L. ‘Little Plum’ - Attractive dark green succulent rosettes and unusual rose-purple flowers with a touch orange. One of the easier Lewisias to grow. 2”(6”) x 4” Sun, Part Shade $code A (Photo)
LIMONIUM minutum - (Plumbaginaceae) NEW Cushion-like masses of spathulate-leaved rosettes produce numerous spikes of small violet flowers. Southeastern France 3"(7") x 6" Sun $code A* (Photo)
(NARBONNE BLUE FLAX) -
Mediterranean form of blue flax that is longer lived and fuller than our native
species. This robust plant forms dense mounds of nearly evergreen foliage
covered with deep sky blue flowers for months. A
Plant Select® Recommendation
for 2013. 12”(15”) x 15” Sun, Part
Shade $code A* (Photo)
MATTHIOLA montana - (Brassicaceae) An exciting new introduction from the mountains of Turkey. The compact mounds of long, gray-pubescent leaves are covered with abundant umbels of fragrant, yellow-eyed, lavender-pink flowers on stout 2” stems. 3”(5”) x 6” Sun $code A* (Photo)
MOLTKIA petraea - (Boraginaceae) A spectacular, highly-branched sub shrub forming a gradually increasing mounded mat of blue-green foliage and producing numerous 4" flowering stems topped with clusters of dark sky-blue flowers. Very drought tolerant. Albania to Dalmatia 3"(6") x 8" Sun, Xeric $code A* (Photo)
OENOTHERA - (Onagraceae) A large and widely distributed group of species in the Western Hemisphere. Often referred to as ’evening primroses’, they encompass a wide range of forms with a number of very nice plants and many that are of little horticultural interest. Most are very drought tolerant and easy to grow.
O. fremontii ’Lemon Silver’ - An excellent selection with large, broadly lanceolate, silver-green foliage and spectacular, large lemon-yellow flowers that glow in the afternoon and evening light from early summer to frost. The flowers are followed by large four-winged fruits. 4” x 24” Sun, Xeric $code A (Photo)
OPUNTIA - (Cactaceae) The second largest genus of cactus with the most extensive north-south distribution in the family. The plants are composed of numerous jointed cylindrical stems or flat pads that are generally heavily armed with long spines that arise from a small circle of small spines called glochids. In some cases, only the glochids are present. Many of the species and cultivars produce spectacular floral displays and are very popular in xeriscape gardens.
O. debreczyi v. denuda 'Potato' - Globe-shaped, spherical stems with short glochids and occasional yellow flowers. The stems turn shades of purple in winter. Ideal for rock gardens. Colorado Plateau into south-central Wyoming 3" x 12" Sun, Xeric $code A* (Photo)
OSTEOSPERMUM - (Asteraceae) A group of South African composites with attractive green to gray-green foliage and very showy flowers. Most are not hardy in colder climates but the cultivars offered here have flourished in our Zone 5 and have developed into magnificent specimens.
O. 'Avalanche' 'PP22,705 (Avalanche White Sun Daisy) - Dazzling white flowers with a gold-metallic backing are produced from April through summer over glistening mats of lustrous, nearly succulent, evergreen foliage. It has greater disease resistance and heavier summer bloom than the other hardy sun daisies. A spectacular addition to the sunny border or xeriscape. A Plant Select® Introduction for 2011. South Africa 4"(8") x 12" Sun, Part Shade $code A* (Photo)
OXYTROPIS - (Fabaceae) A group of marvelous dry land plants, much like Astragalus, with pinnate leaves and heads of pea flowers. Most require xeric treatment and make excellent trough subjects.
O. besseyi v. argophylla - RENEW Very condensed cushions of silvery-white foliage and racemes of brilliant magenta flowers. Beaverhead Co., MT 2”(3”) x 4” Sun, Xeric $code A* (Photo)O. besseyi v. ventosa - RENEW Beautiful tufts of silver foliage adorned with clusters of rose-pink flowers on very short stems. One of the best of the genus found growing on N-facing alpine limestone slopes. Park Co., WY 2” x 3” Sun, Alpine $code A* (Photo)
O. multiceps - Silvery mounds of small, lanceolate leaves adorned in spring with bright pink flowers followed by white calyxes that inflate as the seed develops. An outstanding trough plant.. Wyoming native 2” x 6” Sun, Xeric $code A (Photo)
O. splendens - Erect clumps of whorled, pubescent, silver leaves and woolly heads of pink flowers. Park County, CO 4”(6”) x 4” Sun, Alpine $code A (Photo)
PENSTEMON - (Scrophulariaceae) From the American West, Penstemons are the work horses of the xeriscape or native garden, providing substance, shape and long-lasting color. They're also adored by hummingbirds and butterflies.
P. alamosensis - Beautiful evergreen rosettes of large, blue-gray leaves and tall stems of brilliant coral-red tubular flowers. A beautiful specimen for the xeric garden in or out of flower. A rare endemic from the mountains of southern New Mexico. 3"(15") x 8" Sun, Xeric $code A (Photo)
P. arenicola - Very similar to Penstemon nitidus with dense spikes of glowing, sky-blue flowers atop nice rosettes of glaucous foliage. One of the first to flower in early spring. Wyoming 3”(6”) x 6” Sun, Trough $code A* (Photo)
P. cardinalis ssp. regalis - NEW Tall stems of dark red tubular flowers above large rosettes of fleshy green leaves. Smaller in stature than the species and wider leaves. Eddy Co., NM 3"(14") x 6” Sun, Xeric $code A (Photo)
P. laricifolius v.
laricifolius - Very
floriferous species with grass-like linear green foliage and numerous stiff,
thin flowering stems of pinkish-purple flowers. Excellent trough plant!
Fremont CO,. WY 2”(6”) x 4” Sun, Trough $code A*
P. mensarum (Grand Mesa Beardtongue)- Attractive mats of evergreen foliage and stunning cobalt blue spikes in early spring that last for nearly two months. The foliage turns a lovely orange-red in winter. An outstanding species restricted to the mountains of Western Colorado. A Plant Select® Recommendation for 2011 8”(20") x 12” Sun, Part Shade $code A* (Photo)
P. paysoniorum - A nice dwarf species with glabrous, gray-green foliage and several stems of abundant small blue flowers. A good plant for the dry rock garden. SW Wyoming 6" x 6" Sun $code A (Photo)
P. pseudospectabilis (Desert Beardtongue) - A large species with dark green toothed leaves that clasp the base and become disk-like on the upper parts of the stem. The flowers are glandular and pink to rose-pink. A great plant for the large dry garden. A Plant Select® Recommendation for 2015. Catron Co., NM 8"(20") x 10" Sun, Xeric $code A (Photo)
P. superbus (Pink Form) - Glaucous foliage and tall stems of bright dark-pink flowers. Makes quite a statement in the late spring garden! 6”(24”) x 8” Sun $code A (Photo)
P. uintahensis - Leathery rosettes of dark-green linear-spathulate foliage and numerous short stems of very attractive sky-blue flowers. Large enough to be effective in the rock garden yet small enough to use as the centerpiece in a partly shaded trough. One of the easiest of the smaller species to grow and flower. Uintah Co., UT 2"(5") x 6" Sun, Part Shade $code A (Photo)
PETROCALLIS pyrenaica - (Cruciferae) NEW Cushions of ciliated greyish-green rosettes smothered with short stems of pale pink to lilac four-petalled flowers, much like a Draba. Pyrenees, Alps and Carpathians 2"(3") x 4" Sun, Part Shade, Alpine $code A* (Photo)
(Moroccan pincushion flower) -
Attractive congested mats of crinkled
evergreen foliage and attractive, stemless, scabiosa-like mauve flowers. The
flowers are followed by fuzzy, fawn-brown seed heads. A Plant Select® Petites
Recommendation for 2016. Turkey Sun 2” x 12”
$code A* (Photo)
RABIEA - (Aizoaceae) This genus of succulent plants is native to South Africa. The plants form compact mounds of rosettes with sickle-shaped leaves that arise from thick tuberous roots. A number of the species in this group have proven to be some of the most winter hardy of the South African succulents.
R. albipuncta - One of the most winter hardy of the South African succulents, forming hard pads of dark green triangular leaves that are covered in early spring with spectacular 1.5” glowing yellow flowers. Easy to grow if given good drainage and full sun. 2” x 6” Sun, Xeric $code A* (Photo)
ROSULARIA - (Crassulaceae ) A useful group of plants forming mounds of succulent rosettes of small leaves with interesting variations of color and texture. All perform well in a variety of settings, but are best displayed when planted among rocks or in crevices. In parts of the country where sunlight is intense, provide filtered shade at least during the afternoon and/or plant on an E to NE exposure.
R. persica - This rarely offered species from western Asia forms compact mounds of succulent green rosettes and stems of white flowers. Iran, Lebanon, Syria 2”(4”) x 3” Sun, Part Shade $code A* (Photo)
R. sempervivum - Robust, glossy-green rosettes and stems of attractive pink flowers. Caucasus to Asia Minor 2”(5”) x 6” Sun, Part Shade $code A (Photo)
SALVIA - (Lamiaceae) Members of this group of 'sages' are very useful in providing color to the garden from late spring through summer and into fall.. The aromatic foliage provides interesting shape and texture and large tubular two-lipped flowers are produced in whorls along the tall flower spikes. Most require little water and are easily grown.
S. dorrii - Extremely aromatic silver foliage and glowing purple flowers. This ‘purple sage’ of the American West makes a very striking specimen in the xeric garden. 8"(12") x 12" Sun, Xeric $code A* (Photo)
S. jurisicii - This unusual Salvia forms a dense bush of ferny hirsute foliage
and produces deep-blue spikes of flowers for much of the summer. E. Europe 10”(15”) x 15” Sun $code A
S. pachyphylla (Mojave Sage) - An exciting introduction from the mountains of California! This shrubby perennial is much like S. dorrii but larger in all aspects. The intensely aromatic, evergreen , silver-green leaves set off persistent mauve bracts surrounding small blue flowers. Flowering from June to frost. A Plant Select® Introduction for 2005. Spectacular! 30” x 30” Sun $code A* (Photo)
S. phlomoides - An extremely attractive species from Morocco, forming rosettes of tomentose, gray-green foliage and impressive spires of purple flowers. 3”(12”) x 6” Sun $code A* (Photo)
SCROPHULARIA macrantha (Red Birds in a Tree) - (Scrophulariaceae) An outstanding and
versatile perennial with dark-green, serrated leaves and glowing dark-red flowers
on a sub-shrub that continues to expand from the base. The flowers look like
'Red Birds in a Tree'. A Plant Select®
Introduction for 2008. 12”(24”) x 12” Sun $code A
SCUTELLARIA - (Lamiaceae) Known commonly as ’skullcaps’, these cosmopolitan herbs provide a number of attractive rock garden species. Their bright flowers and attractive foliage are always a welcome addition.
S. resinosa - An outstanding Great Plains native which forms a miniature
shrub of small, gray-green, rounded leaves. In early summer, the upper portions
of the stems are covered with blue-purple flowers with two prominent white
guidelines on the flaring lower lip. Don’t be without this one! 8” x 8” Sun $code A
SEDUM - (Crassulaceae) A large genus of succulent plants with an amazing variety of shapes and sizes. They perform well as groundcovers, crevice plants and the larger species make attractive individual specimens. The winter hardy species are tough and easy to grow and many are quite drought tolerant.
S. sediforme (TURQUOISE TAILS BLUE SEDUM) - A robust and compact heirloom species native to the Mediterranean with succulent blue foliage and creamy-yellow flower. A Plant Select® Introduction for 2013. 3”(6”) x 12” Sun, Xeric $code A* (Photo)
SILENE - (Caryophyllaceae) Summer -blooming plants for the sunny rock garden. The frequently notched or cut five-petaled flowers of white, pink or red are carried on short stems which arise from a fleshy root stalk.
S. lacineata - Rosettes of light-green lanceolate leaves produce 14" flowering stems of starry red-orange flowers all summer. 4"(14") x 6" Sun, Part Shade $code A (Photo)
S. plankii - NEW Attractive tufts of lanceolate, light-green leaves and short stems of bright red-orange flowers. El Paso Co., TX 2"(4") x 6" Sun, Part Shade $code A* (Photo)
STOMATIUM - (Aizoiceae) An interesting genus of South African succulent plants that form mats of variously textured and toothed foliage. The narrow- petaled yellow flowers appear in late afternoon and evening. They have proven to be remarkably cold hardy, performing well at least down to Zone 5.
S. agninum - A very attractive foliage plant, forming tight mats of dull-green, roughened, green-dotted, rhomboidal leaves. Light yellow flowers, but seldom flowers. Very hardy. South Africa 1.5” x 5” Sun, Xeric $code A* (Photo)
S. mustillinum - A very hardy South African succulent forming mats of tightly spaced gray-green leaves roughened with many minute dots. Attractive yellow flowers with many narrow petals open in late afternoon. One of the easiest of the South Africans to grow in cold climates. 1” x 6” Sun, Xeric $code A (Photo)
TALINUM- (Portulacaceae) Another Lewisia relative with fleshy cylindrical
leaves growing from a thick stem or root stalk. The bright white, pink or
magenta flowers with golden stamens open in the afternoon and can be caespitose
or carried on tall thin stems. All will thrive in poor, sandy soil in full sun.
T. brevifolium - Compact clumps of sausage-shaped, opalescent leaves covered with large bright pink flowers in summer. One of the best! Utah 1” x 4” Sun $code A (Photo)
(Lamaceae) A large
group of herbs, shrubs and sub shrubs of wide distribution, especially in the
Mediterranean region. Most have attractive, aromatic foliage, attractive
flowers and are generally quite drought tolerant.
T. aroanium - Mats of attractive, silver foliage and large soft lavender flowers. This is the true species and much different from the plant that is commonly in the trade. Greece 2" x 12" $code A* (Photo)
TOWNSENDIA- (Asteraceae) These condensed asters are often called
“Easter Daisies” because they flower so early in the spring. Most have large
caespitose flowers of white, pink or lavender and form mounds of linear leaves
from green to
silver. Most require a well drained soil in full sun. No garden should be
without a good selection of these wonderful plants.
T. ‘Jeane’s Purple’ - An exceptional plant with dark gray-green foliage and nice purple flowers. Excellent trough plant. 1” x 2” Sun, Part Shade, Trough $code A (Photo)
T. spathulata 'Pryor' - This form from the Pryor Mountains of Montana is probably the type species for T. spathulata. The tight mounds of tomentose silver-white foliage are adorned in early spring with small pale-lilac flowers. Carbon Co., MT 1" x 3" Sun, Trough $code A* (Photo)
VERBASCUM – (Scrophulariaceae) A large group of herbs native to Asia and Europe, primarily the Mediterranean. Most are large summer flowering plants that provide excellent vertical accents in gardens large enough to accommodate them.
V. bombyciferum - The most spectacular of the large Verbascums, forming large, light gray, woolly rosettes and tall woolly flowering spikes of yellow flowers. Very drought tolerant. 10”(48”) x 20” Sun, Xeric $code A (Photo)
VERONICA - (Scrophulariaceae) There are many forms of ‘speedwell’ from small mat- formers to larger more erect plants that bear flowers on tall stems. Most are easy to grow and thrive in sunny settings where only the hardiest will grow.
V. liwanensis (Turkish Veronica) - Mats of small, glossy green leaves covered in spring with clusters of showy blue flowers. One of the best ground covering plants available! A Plant Select® Introduction in 1997. 1” x 12” Sun, Part Shade $code A (Photo)
V. oltensis - Another great miniature Veronica from the high mountains of Turkey. The creeping mats of dark-green, pinnate leaves are covered with azure-blue flowers in spring. Relatively slow growing, this plant works well in crevices in the xeric garden. .5” x 12” Sun, Xeric $code A (Photo)
YUCCA - (Liliaceae) Yuccas are one of the signature plants in the western xeriscape garden. Succulent and evergreen, they provide a strong sculptural accent throughout the seasons with striking foliage and magnificent flowers. There are many species, varying in size from 10' giants to cute 8" miniatures. A surprising number are quite cold hardy.
Y. angustissima - Attractive rosettes of long, narrow leaves lined with filament hairs and tall spikes of cream flowers. Mesa Co., CO 18"(36") x 16" Sun, Xeric $code A* (Photo)
Y. harrimaniae 'San Luis' - This attractive small yucca was found growing at 8000' near San Luis, Colorado. The numerous, narrow light green leaves are generously decorated with white hairs that curl away from the edge of the leaf. Very cute and very hardy. 6"(12") x 6" Sun, Xeric $code A* (Photo)
ZAUSCHNERIA- (Onagraceae) This genus contains some of the most spectacular xeric plants for the dryland rockery. They form upright or creeping green to silver-leafed shrubs that in late summer erupt in a blaze of pink or red tubular flowers which are very attractive to hummingbirds. These plants provide the much needed splash of red in the yellow domination of fall, and the color lasts even past the first frost. In colder areas, these plants are root hardy and the dead foliage should not be removed until spring when new growth begins. They are best planted in spring or early summer.
Z. californica ‘Etteri’ - This form has a more prostrate habit with narrow, silver-green leaves and nice red flowers. This form also blooms a little earlier for us, beginning in late July. 12” x 20” Sun, Xeric $code A (Photo)
Z. californica ‘Wayne’s Select’ - A great new addition with fantastic silver foliage and muted scarlet flowers. Spreads more slowly then most. 18” x 20” Sun, Xeric $code A* (Photo)