Zones: 5 to 10
Size: To 18" tall
Exposure: Sun, Filtered Sun
Blooms in summer, blue flowers, with three petals. Linear to pointed lance-shaped leaves, alternate. Reddish sheath pubescence. Rhizomatous.
Found along streambanks and swamps.
Native to eastern and central US.
Published in Sp. Pl., ed. 2 1: 61 in 1762.