Fibrous-rooted perennial 1.5-5 dm; stems diffusely branched, very slender, glabrous or minutely hairy on the angles; lvs linear, 1.5-4 cm נ1-3 mm, tapering to the base, 1-nerved, glabrous or nearly so; pedicels capillary, 5-15 mm; fls heterostylic; sep lance-linear, 1-2 mm at anthesis; cor purple, hairy within, funnelform, 5.5-7 mm, the lobes half as long as the tube; frs 1.8-2.8 mm, otherwise as in no. 1 [Hedyotis canadensis (Willd.) Fosberg]; stamens and seeds of no. 1. Dry soil; Pa. to Mo. and Okla., s. to Va., Ga., and Tex. May-July. (Houstonia tenuifolia)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
