Synonyms: Prairie Shoestrings | Bastard Indigo A shrub-like perennial with compound leaves with a silvery pubescence, purple flower occur in tight spikes at the ends of the branches in late June-July. Attracts butterflies. Found across Manitoba, south to LA and NM. Prairies, open woods, roadsides. Prefers full sun, mesic to dry soils, adapted to sandy or gravelly soil, can thrive in poor soil and is very drought tolerant, deeply tap-rooted. A nitrogen fixer.