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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. litvinovii - RENEW Tight spiny cushions of silver-gray under stalks of pale pink flowers. Does not get as large as some of the other species. 4”(6”) x 6” Sun $code A*
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*
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. capitatum - RENEW Compact mounds of greenish-blue leaves that resemble a dwarf conifer until smothered in spring with stems of light pink flowers. 2”(5”) x 6” Sun $code A (Photo)
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)
A. subulatum - RENEW An attractive species forming tidy mounds of blue-green foliage covered with nice pink flowers in spring. Turkey 2"(4') x 8" Sun $code A* (Photo)
ALLIUM senescens glaucum - (Amaryllidaceae) 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 'Halo' - Pale yellow flowers with a halo of white at the tip of each petal 2" x 4" Sun, Xeric $code A* (Photo)
A. x ’High Noon’ - A selection from the Aloinopsis x Nananthus cross with magnificent light yellow flowers with an electric blue-pink wash at the end of each petal. 2” x 4” Sun, Xeric $code A* (Photo)
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 ‘Orange Rush’ - NEW Similar to Aloinopsis x ‘Thai Dyed’ but in a better shade of orange. 2” x 4” Sun, Xeric $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. spathulata - A gem from the rich alpine flora of South Africa! Dense mounds of spatulate, succulent, blue-green leaves covered in spring with large magenta flowers. As with all ‘ice plants’, provide good drainage and decrease watering in fall to induce dormancy for winter. 2” x 4” Sun, Xeric $code A* (Photo)
A. x ‘Thai Dyed’ - A spectacular hybrid created by a chance cross pollination of a plant currently calling Aloinopsis aff. villettii and Aloinopsis spathulata in the garden of David Salmon from High Country Gardens. Hard to believe such a drastic color break could occur in only one generation, but that seems to be the case. Enjoy! 2” x 4” Sun, Xeric $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 - 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)
ANACYCLUS depressus - (Asteraceae) A very nice mat-forming daisy with attractive feathery silver-gray foliage and cute white flowers with red undersides. Easy to grow and drought tolerant. Morocco 1”(2”) x 6” Sun $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 hardy! South Africa 2”(5”) x 12” Sun, Not too hot and dry $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.ledebouriana - NEW Evergreen hummocks of silver-green foliage adorned with starry, white flowers in summer. Sultan Dag, Turkey 4” x 6” Sun $code A* (Photo)
ARTEMISIA spinescens - (Asteraceae) NEW Dense, spiny shrublets of aromatic, pale green, small fuzzy leaves divided into narrow pointed segments. The racemes of light-yellow flowers sprout from the leaf axils. Sweetwater Co., WY 4” x 6” Sun, Xeric $code A
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 - NEW 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. 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. mollissimus v. thompsonii - Very attractive clumps of long silver pinnate foliage and short stalks of purple flowers. The flowers are followed by white fuzzy seed pods. San Juan Co., UT 3”(7”) x 9” 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*
A. sp. '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)
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)
CAESALPINA repens - (Fabaceae) NEW Clumps of bluish-green, Mimosa-like leaves and tapered recemes of yellow and orange flowers that are followed by decorative redish-purple seed pods.. The flowers are intensly aromatic. Emery Co., UT 2”(4”) x 7” Sun, Xeric $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
CALYLOPHUS serrulatus - (Onagraceae) RENEW 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
C. choruhensis - An outstanding dwarf Turkish Campanula, forming small clumps of green topped in summer with pink-tinged flower buds that open into huge white starfish flowers. Outstanding! 2”(3”) x 4” Sun $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 (Photo)
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)
C. sessiliflora - Olive-green foliage with spikes of attractive tricolor flowers of pink, cream and green. This dry prairie ‘Paint Brush’ does well in pot culture and seems to be less dependent on host plants. Unusual. Pueblo Co., CO 5"(8") x 8" Sun, Xeric, Trough $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)
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 MONGOLIAN BELLS® - NEW 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) - NEW 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. assyricus - RENEW Tight mats of gray-green pubescent foliage and sessile light pink flowers. Outstanding! Turkey 2” x 8” Sun, Xeric $code A* (Photo)
C. compactus - RENEW Congested mats of shimmering silver foliage and sessile white flowers. Superb! Turkey 2” x 8” Sun $code A* (Photo)
C. compactus ‘Pink’ - RENEW An outstanding pink flowered form of the more common white flowered species. Turkey 2” x 8” $code A* (Photo)
CORYPHANTHA echinus - (Cactaceae) 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)
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. paradoxa - One of the best small species in the genus. The tufts of green, spatulate leaves produce masses of white, yellow-throated, waxy flowers that are intensely fragrant. Montrose Co., CO 2”(3”) x 4” Sun, Xeric $code A*
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’ - NEW A great miniature form of the species with dark green foliage and dark pink flowers. 4” x 6” Sun, Part Shade, Trough $code A**
D. jasminea - NEW 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’ - NEW 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’ - NEW 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' (formerly D. x cneorum f. verlotii x arbuscula) - 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 15” 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. 8” x 12” Sun, Part Shade $code A** (Photo)
D. x susannae ‘Tichborne’ - NEW The most compact of the x susannae hybrids forming tight domes of matt green leaves that are covered in spring with fragrant, pale,rosy-purple flowers. 8” x 15” 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. basuticum 'Gold Nugget' - Previously listed as D. congestum, this plant forms tight mats of light green leaves covered with sessile yellow flowers in spring. Good trough plant and one of the hardiest.. 1” x 4” Sun, Alpine $code A (Photo)
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 'P003S' (Carlile™ Pink Ice Plant) - 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. Very hardy. 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 RED MOUNTAIN® (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. FIRE SPINNER™ (FIRE SPINNER™ Ice Plant) - NEW 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. 'Lavender Ice' (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. 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. TABLE MOUNTAIN® (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. haematocalyx ssp. pindicola - Tight mats of gray-green pointed foliage covered with hot pink flowers. A good selection for dry sunny slopes. Macedonia 2” x 6” Sun $code A* (Photo)
D. microlepis - One of the small species, forming tight mounds of sharp, deep green leaves and producing short stems of pink-purple flowers. Makes a good trough specimen. Bulgaria 2”(3”) x 6” Sun $code A (Photo)
D. scardicus - NEW Dwarf cushions of glaucus foliage and short stems of solitary pink flowers. Macedonia 2”(3”) x 4” Sun, Part Shade $code A
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 (Photo)
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® (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. cappadocica - Tight cushions of hairy, gray-green foliage covered in early spring with short-stemmed bright yellow flowers. Turkey 1"(2") x 4" Sun, Part Shade, Alpine $code A* (Photo)
D. polytricha - Compact mounds of hairy, gray-green foliage adorned with short stems of bright yellow flowers in early spring. 2" x 4" Sun $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. 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 - Robust green stems with 5-8 ribs armed with heavy tan and gray-brown spines. The flowers are a magnificent scarlet-red with green stigmas. This is likely variety gonacanthus and will form a mound of branching stems 12"-18" in diameter in time. 5" x 3" Sun, Xeric $code A* (Photo)
E. viridiflorus - Native to the prairies and foothills of southern Colorado, this small clumping cactus is as hardy as they get. Appressed white and red spines and aromatic greenish-yellow flowers in spring. Very hardy. 2” x 2” Sun, Xeric $code A*
E. x lloydii - A naturally occurring hybrid between E. coccineus and E. dasyacanthus with stout, clumping green stems with 6-8 ribs armed with heavy tan spines. The large attractive flowers are generally shades of orange. A very reliable garden plant. 6" x 3" Sun, Xeric $code A* (Photo)
ECHIUM amoenum (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. dalmaticus - Tufts of narrow grass-like leaves producing clusters of upward facing violet-blue flowers in mid to late summer. Native to the mountains of Dalmatia in Croatia, this species makes an excellent trough subject. 3"(5") x 5" Sun, Part Shade $code A
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 (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*
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. consimilis - RENEW 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 - NEW 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. corymbosum v. aureum - NEW One of the larger shrubby species forming a loose mound of stems with gray-green foliage. When in flower, the plant is completely covered with small yellow flowers. A spectacular specimen for the large rockery or dryland garden. 10”(20”) x 24” Sun, Xeric $code A* (Photo)
E. douglasii v. meridionale - Attractive mats of round-tipped, elliptical leaves covered with a dense white felt and short-stemmed golden yellow capitate inflorescences. Washoe Co., NV 3”(4”) x 12” Sun, Xeric $code A* (Photo)
E. ericifolium v. pulchrum - RENEW 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. gracilipes - An outstanding species that forms tufts of gray-green tomentose foliage and stems of capitate flower heads that begin cream and mature to vibrant dark red.. Holds its form well in cultivation. Inyo Co., CA 2”(3”) x 5” Sun, Alpine $code A* (Photo)
E. heracleoides - NEW Attractive mats of gray-green foliage produce large compound-umbellate infloresecenses on tall stems with a distinctive whorl of leaf-like bracts at midlength. 4”(10”) x 15” Sun, Xeric $code A (Photo)
E. jamesii - NEW Mats of gray green leathery foliage and attractive white flowers in late summer and fall. The flowers change to rusty-red as they age. A common species along the front range in Colorado. 5”(9”) x 12” Sun, Xeric $code A (Photo)
E. pauciflora - NEW Compact mats of tomentose, silver-white foliage and short stems of whitish brown to rose flowers. Pryor Mtns., MT 2”(4”) x 6” Sun, Xeric $code A* (Photo)
sphaerocephalum v. sphaerocephalum -
Congested mats of gray-green, tomentose foliage covered with
short stems of attractive bright yellow flowers from May-July. Washoe Co., NV
2"(4") x 6" Sun, Xeric $code A*
E. strictum v. anserinum - Loose mats of grayish-tomentose foliage covered with stems of bright yellow flowers. Washoe Co., NV 2"(6") x 6" Sun, Xeric $code A* (Photo)
E. umbellatum v. aureum KANNAH CREEK® (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. nevadense - Spreading mats of gray felted, oval leaves with bright chrome yellow umbels that age to deep rusty pinks. Washoe Co. NV 4"(8") x 10" Sun, Xeric $code A* (Photo)
ERODIUM chrysanthum (Golden Storksbill) - (Geraniaceae) This Grecian gem forms extremely attractive mounds of silver, fern-like leaves and produces scapes of light yellow flowers in spring and sporadically throughout the summer. The foliage alone makes this a must have! A Plant Select® Recommendation for 2011 6”(8”) x 15” Sun $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 - Globes of interwoven brown and white spines with dark brown tips. Attractive bright pink flowers. Pueblo Co., CO 3” x 3” Sun, Xeric $code A* (Photo)
E. vivipara v. buoflama - Globes of densly interwoven white spines with dark brown tips. Attractive flowers that vary from yellow to peach to pink. 3” x 3” Sun, Xeric $code A*
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® (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 COLORADO GOLD® (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)
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 and 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)
Festuca mairei - Larger than most of the commonly offered species of fescue, this species develops into an impressive specimen with rigid, gray-green leaves and feathery seed heads. 24" x 24" Sun $code A (Photo)
Muhlenbergia reverchonii - 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. One of the best recent introductions. 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 (Photo)
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)
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. 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)
HIRPICIUM - (Asteraceae) A South African genus of Gazania-like composites found growing in dryer exposed locations in the high Drakensberg. More durable and heat tolerant than the Gazanias.
H. amerioides 'Tiffendell Dwarf' - A new variety collected near Tiffendell, South Africa by David Salmon of High Country Gardens. The plants are half the size of the species and form more congested mats of bristly gray-green foliage. The white daisies with dark gray reverses appear from spring through fall. Very cute! 2”(3”) x 6” Sun $code A (Photo)
HYMENOXYS - (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 without.
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. scaposa - Masses of yellow flowers covering attractive mounds of delicate green foliage from early spring to mid summer. Very heat and drought tolerant. 3"(6") x 6" Sun $code A (Photo)
JOVIBARBA heuffelii - (Crassulaceae) Very similar to Sempervivums but unique in that they do not produce ofsetts 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.
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 'Orion' - Soft gray-green leaves with a silver edges. 2" x 2" Sun, Part Shade $code A* (Photo)
J. heuffelii 'Sylvan Memory' - Dark reddish-purple leaves with a silver edge. 2" x 2" 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 – (Brassicaciae) 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 - NEW Tiny silver gray tufts with short scapes of yellow flowers. Uintah Co., UT 1”(2”) x 2” Sun, Xeric $code A (Photo)
LEUCANTHEMUM atlanticum - A marvelous new plant brought back from Morocco by Mike Kintgen of the Denver Botanic Gardens. The attractive shiny, dark green, pinnate foliage produces numerous short stems of nice white flowers with yellow centers. An excellent plant for a N or NE facing wall or crevice. Morocco 3"(5") x 8" Part Shade $code A* (Photo)
LINUM narbonense (NARBONNE BLUE FLAX) - NEW A 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)
MINUARTIA - (Caryophyllaceae) Cushion forming plants similar in character to Arenaria. Native to the alpine regions of Asia, Europe and North America, most are of easy culture and provide interesting foliage and prolific bloom from spring to early summer.
M. stellata - Light green cushions of needle-like foliage and nice white flowers in early summer. Long-lived and reliable. 2"(3") x 6" Sun $code A (Photo)
M. saxifraga ssp. tmolea - NEW Very dense silver-green cushions and attractive white flowers on very short stems. Boz Dag, Turkey 2" x 6" Sun $code A* (Photo)
MOLTKEA 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' (PPAF) (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)
OTHONNA capensis - (Asteraceae) This succulent composite forms mounds of fat, cylindrical, blue-green leaves and bright yellow flowers on thin 2" stems. Flowers appear from spring through fall to make a grand display in the rockery. A must for the succulent fancier. South Africa 2"(4") x 6" Sun $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. salmonensis - RENEW Mats of pinnate, silver-green foliage and spectacular racemes of magenta flowers. Custer Co., ID 2”(4”) x 8” Sun, Xeric $code A*
O. lazica - NEW Compact tufts of gray-green tomentose foliage and nice white to pale blue flowers. Alpine meadows, Zigana Dag, Turkey 2” x 4” Sun, Alpine $code A*
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. prenja - NEW Cushions of white lanate foliage and dark purple flower. Mavrovo, Macedonia 2” x 4” Sun, Alpine $code A*
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)
O. x lambertii - NEW This apparent hybrid with O. sericea produces larger plants with flowers in an assortment of colors ranging from blue to pink. Summit Co., CO 3”(10”) x 8” Sun, Alpine $code A*
PELARGONIUM - (Geraniaceae) A large group of annual and perennial herbs and shrubs native mostly to South Africa with two species in Turkey. With the exception of the Turkish species, all are not reliably cold hardy.
P. endlicherianum ’Select Form’ - Similar to the species but the leaves are more finely divided and slightly hairy. The flowers are the same but the color is an outstanding bright deep pink. Turkey 6”(12”) x 12” Sun, Part Shade $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. aridus - One of the smaller Penstemons, forming tidy mats of dark-green leaves and 4” stems of attractive blue flowers. Makes an excellent trough subject!
1”(5”) x 4” Sun, Trough $code A (Photo)
P. hallii - One of the most beautiful alpine Penstemons, this gem is found in the high mountains of Colorado. Forms attractive clumps of dark green linear foliage and short stems of violet-blue flowers in late spring. Park Co., CO 4”(8”) x 6” Sun, Alpine $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* (Photo)
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. x mexicale RED ROCKS® (RED ROCKS® Penstemon) - A hybrid made by Bruce Meyers between Mexican and American wild Penstemons that has produced a stunning new introduction that is both beautiful and easy to grow. Mounds of attractive, dark green leaves produce stems of bright rose flowers all summer. This plant is a Plant Select® Introduction for 1999. 8"(15") x 15" Sun $code A (Photo)
P. nitidus - Spectacular displays in earliest spring with many flowered spikes of aquamarine atop blue-gray leaves. An indispensable member of the early spring garden and marvelous companion for early spring bulbs. Wyoming, Montana 4"(8") x 6" Sun, Xeric, Trough $code A (Photo)
P. pseudospectabilis - 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. Catron Co., NM 8"(20") x 10" Sun, Xeric $code A (Photo)
P. superbus - Attractive blue-green foliage rosettes and tall spikes of coral-red flowers. New Mexico, Arizona 4”(12”) x 8” Sun $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)
PTEROCEPHALUS depressus - (Disacaceae) NEW Attractive congested mats of crinkled evergreen foliage and attractive, satemless, scabiosa-like mauve flowers. The flowers are followed by fuzzy, fawn-brown seed heads. 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. muratdaghensis - Succulent mounds of light green rosettes tinged with red on the edges when grown in strong light. Nice cream flowers. 2"(4") x 6" Sun, Part Shade $code A (Photo)
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. Caucases to Asia Minor 2”(5”) x 6” Sun, Part Shade $code A (Photo)
R. sempervivum v. glaucophylla - An outstanding variety with blue-green rosettes and stems of pure white flowers. 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 (Photo)
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 - NEW 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 (Photo)
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 (Photo)
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. cauticola ‘Lidakense’ - One of the best fall blooming sedums, forming attractive mounds of glaucous, purplish-gray foliage and gorgeous deep pink flowers. 3”(5”) x 8” Sun, Part Shade $code A (Photo)
S. obtusifolium - This outstanding species forms prostrate mats of dark green rosettes that are evergreen. In spring, short flowering stems of light red flowers are produced as the rosettes elongate. After flowering, the flowering stems persist and turn an attractive dark brown. The rosettes return in late summer and continue to be decorated by the flowering stems, producing an intriguing specimen in the fall and winter. Outstanding! 1” (4”) x 6” Sun, Part Shade $code A (Photo)
S. rupestre ‘Angelina’ - An outstanding cultivar with trailing stems of gold-green foliage that turn a glorious orange in winter. Originally found in a Croatian garden. 3”(5”) x 15” Sun, Part Shade $code A (Photo)
S. sediforme (TURQUOISE TAILS BLUE SEDUM) - NEW 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. davidii - NEW
Nice compact cushions of narrow light green foliage and large pink flowers on
short stems. Sechuan, China 2”(3”) x 4” Sun, Alpine $code A
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. spinescens- A miniature of T. calycinum, forming more condensed mounds with the same hot magenta flowers. Makes a excellent trough specimen. 2"(5") x 5" Sun, Xeric, Trough $code A* (Photo)
TEUCRIUM - (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)
TONESTUS pygmaeus - (Asteraceae) NEW Very compact tufts of hairy, oblong leaves and attractive yellow flowers on very short stems. Park Co., CO 1.5”(2”) x 4” Sun, Alpine $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. exscapa - Forms tight buns of silver leaves covered in early spring with large glowing white flowers often suffused with pink. This is a particularly robust form grown from seed collected near Pueblo, CO. This one is a must! 2" x 6" Sun, Xeric, Trough $code A (Photo)
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. leptotes - NEW Tufts of linear, silvery leaves with white to pale pink flowers embedded in the foliage. Sanpete Co., UT 1” x 2” Sun, Xeric, Trough $code A* (Photo)
T. spathulata - Tight mounds of narrow, spatulate, silver leaves and caespitose white flowers. Difficult in the open garden but an outstanding trough plant! 2” x 4” Sun, Xeric, Trough $code A* (Photo)
T. spathulata 'Pryor' - NEW 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. atroviolaceum - Very congested rosettes of wrinkly, dark green foliage and tall thin flowering stalks of deep violet-purple flowers throughout the summer. Tolerates a wide range of soils and exposures. Caucases 3"(15") x 6" Sun, Part Shade $code A
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 - (Scrophulariacea) 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. CRYSTAL RIVER® (CRYSTAL RIVER® Veronica) - This excellent groundcover is a hybrid between V. liwanensis and V. pectinata. Much like V. liwanensis in leaf and flower but slightly larger and more vigorous. Tiny blue flowers appear in a solid mass in spring, with scattered blooms throughout the season. A Plant Select® Introduction for 2003. 3” x 24” Sun, Part Shade $code A (Photo)
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. aff. angustissima - 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)
Z. garrettii ‘Siskiyou Dwarf’ - Smaller green-leaved form with good scarlet flowers and more prostrate growth habit. This plant is an early bloomer, starting in mid July and continuing to frost. 6” x 18” Sun, Xeric $code A (Photo)