Annuals (biennials?), usually fibrous-rooted. Stems usually 1, erect to decumbent-ascending. Leaves: basal and proximal cauline 30-60 × 7-22 mm. Involucres 3.5-6 mm. Ray florets (8-)16-26; corolla laminae white, occasionally drying with bluish midstripe abaxially, (6-)8-17 mm. Disc floret corollas 2.5-3.7 mm. Cypselae (1.4-)1.6-2(-2.2) × 0.9-1.1 mm, faces minutely papillate-pebbly, linear striations barely discernible, usually glabrous, sometimes sparsely glochidiate-hairy distally. 2n = 8. Flowering Apr-Jun(-Jul). Rocky (limestone) banks and ridges, alluvial fields, stream banks and terraces, open juniper woods, glades, roadsides; 50-300 m; Ala., Ga., Ky., Miss., Tenn.