Synonyms: Black Sampson | E. pallida var. angustifolia A perennial, leaves narrow (linear- lanceolate), flowers are violet, with shorter petals than E. pallida or E. purpurea. Produces a long taproot. Blooms in mid June to late July. Found across MN to Saskatchewan, south to OK, TX; dry upland prairies and barrens. Best in full sun, dry well-draining soils; perfect for Shortgrass Prairie mixes and xeriscaping.