Silver Speedwell
Veronica spicata incana
Furry, silvery white foliage forms a 1– 1/2 -ft.-wide mat. Blooms in summer, producing deep viol...
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Silverberry
Elaeagnus commutata
Native to Alaska, Rocky Mountains, northern plains of U.S. and Canada. Grows upright to 12 ft. tall, 6...
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Silverberry
Elaeagnus pungens
Native to China, Japan. Has rather rigid, sprawling, angular habit of growth to 10 to 15 ft. high and ...
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Silverstem Lupine
Lupinus argenteus
Perennial. Native to the Southwest, Sierra Nevada, and the Rocky Mountains. To 2 ft. high, 1 ft. wide,...
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Single-Leaf Piñon Pine
Pinus monophylla
Native to Southeastern California, Baja California, Arizona, Utah. This produces edible pine nuts. Gro...
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Sino-Siberian iris hybrids
Iris hybrid (Sino-Siberian)
Specialists may offer various Sino-Siberian species. Most feature drooping falls and erect to flaring ...
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Sitka Spruce
Picea sitchensis
Native to cool, foggy areas from Alaska to California. The largest of all spruces, this is a pyramidal...
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Skullcap
Scutellaria
These clump-forming perennialshave square stems and pairedleaves. Long, tubular flowersflare out into ...
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Skullcap
Scutellaria baicalensis
Native to Siberia, China,and Japan. Stems first spread,then grow upright, forming aclump 1 1/2 ft. hig...
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Skullcap
Scutellaria resinosa
Native from Kansas andColorado south to Texas andArizona. Mounding plant 6–8 in.tall and 1 ft. wide, w...
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Sky Flower
Duranta erecta
Native to southern Florida, West Indies, Mexico to Brazil. Fast growing to 10–25 ft. tall, 6–10 ft. wi...
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Sky Lupine
Lupinus nanus
Annual. Native from California to British Columbia.To 8–24 in. high, 9–12 in.wide. Spring flowers are ...
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