From Flora of Indiana (1940) by Charles C. Deam
In sandy soil along roadsides and railroads and in fallow fields. Infrequent in the lake area and in the western part of the state. Mostly in prairie habitats.
Stout, 4-10 dm; lvs numerous, linear or lance- linear, 1-2 dm, scabrellate; umbels 2-10, densely fld (fls often 30-100) on peduncles 1-2(-3) cm; pedicels hirsutulous with spreading hairs; cor pale greenish or slightly purplish, its lobes reflexed, 4-6 mm; hoods 2-2.5 mm, the base separated from the cor by a distinct column, appressed to the gynostegium, obtuse at the summit, reaching just above the base of the anther-wings; horns none. Dry sandy soil and prairies; W.Va., O., and Mich. to Wis., n. Io., Kans., Okla., Ark., and sw. Ky. June-Aug. (Acerates h.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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