From Flora of Indiana (1940) by Charles C. Deam

Infrequent to local on dry, wooded or washed slopes. My specimens are mostly from the southern part of the state.

……

Indiana Coefficient of Conservatism: C = 5

Wetland Indicator Status: UPL

.Stems 3-7 dm, hairy throughout with straight, subulate, ±reflexed hairs 0.1 mm, the same pubescence ±developed on both sides of the narrowly lanceolate or lance-oblong lvs; infl glandular, 1-2.5 dm; cal 2.5-5 mm at anthesis; cor 1.6-2.2 cm, white, marked with fine purple lines in the throat; seeds 0.5-0.7 mm; 2n=16. Dry woods and fields; Me. to Minn., s. to Va. and Ark. Apr.-June. (P. arkansanus)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.