From Flora of Indiana (1940) by Charles C. Deam
This rare species is known only from the type locality in Greene County and in moist sands of the northwestern part of Lake County.
Stems 2-5 dm, with a few stiffly ascending branches, strongly striate-angled or narrowly 4-winged, usually somewhat scabrous on the angles; herbage persistently yellow-green; pedicels 1-2 times as long as the bracts, ascending at usually 20-30л cal-tube 2.5-3 mm, reticulate-veiny, the lobes broadly triangular, 0.7-1 mm; cor 1-1.5 cm, pink, with 2 yellow lines and some purple spots in the throat, the lobes ±truncate; pollen-sacs 0.5-1.3 mm; fr subglobose, 4-5 mm; seeds yellow-brown; 2n=26. Dry prairies, open woods, and barrens, especially in sandy soil; sw. Ont. to O., Wis., Mo., and Kans., rare. (Gerardia s.)
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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