Flowers: calyx tube narrowly urceolate-campanulate, 13-18 × 6-10 mm; lobes spreading, 2.5-8 × 3-9 mm. 2 n = 26. Flowering late winter-spring (Mar-May). Upland deciduous and mixed deciduous-conifer forests; 0-600 m; Ala., Fla., Ga., La., Miss., N.C., S.C., Tenn., Va.