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Dry fields, prairies, open woods, usually in sandy soil.
NH to southeast MN, south to FL, NE, and TX.
Herbaceous perennial; stems unbranched, erect or decumbent, 30-80 cm; leaves in 2-5 pairs, oval or broadly oblong, 7-15 cm, obtuse or rounded at the summit, broadly rounded or commonly cordate as the sessile or subsessile base; peduncle 10-30 cm, single or rarely two; umbel solitary, terminal, large, usually many-flowered; corolla greenish-purple, the lobes 8-11 mm; hoods pink, 5 mm, about equaling the gynostegium, the lateral margins adjacent, the broad summit truncate, entire or with a few low obtuse lobes; horns subulate, much exsert; fruit 10-13 cm, erect on deflexed pedicels.
Flowers June to August
Wetland Indicator: NA
Unfortunately I haven't yet been able to catch this species in bloom. It is supposed to bloom into July or August but in Ohio where these pictures were taken they have always finished flowering by the beginning of July.
Gleason, Henry A.
and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States
and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
© Michael Hough 2018