Virginia Tech Dendrology

Schott indigobush Fabaceae Psorothamnus schottii (Torr.) Barneby Listen to the Latin symbol: PSSC5
Leaf: Nearly appears leafless because leaves are small and often sparse, alternate, deciduous, linear, 1/2 to 1 inch long, 1/16 inch wide, entire edges, upper surface light blue-gray, finely glandular, lower surface green.
Flower: Attractive, pea-like, deep purple-blue, 1/3 inch long, occur along the twig in open 4 inch long clusters, appearing in late spring and early summer.
Fruit: Small, odd-looking one-seeded legume, 3/8 inch, egg-shaped, pointed end, covered in dark red glands.
Twig: Slender yellow-green, later turning light brown; heavily-branched with many spine tipped twigs.
Bark: Light gray-brown and smooth when young, developing darker narrow rough ridges.
Form: Large shrub with many spiny branches and crooked limbs, up to 10 feet tall.
 Looks like: desert smoke tree - Fremont's dalea
leaf twig bark form1 map
Additional Range Information: Psorothamnus schottii is native to North America. Range may be expanded by planting. See states reporting Schott indigobush.
External Links: USDA Plants Database
All material © 2018 Virginia Tech Dept. of Forest Resources and Environmental Conservation; Photos and text by: John Seiler, Edward Jensen, Alex Niemiera, and John Peterson; Silvics reprinted from Ag Handbook 654; range maps courtesy USGS from USDA "Atlas of United States Trees" by Elbert L. Little, Jr., Vol. 1 (1971) 3 (1976) 4 (1977) 5 (1978)