Plants 15-50 cm tall. Rhizomes reduced; roots fascicled, 0.5-1 mm in diam. Stems solitary, erect, simple, glabrous or subglabrous except at nodes. Leaves in 3 or 4 pairs near base of stem, sessile or shortly petiolate; blade oblong or lanceolate, 2-10 × 0.5-3 cm, base truncate, rounded, or broadly cuneate, margin coarsely serrate, apex rounded to acute. Inflorescence laxly paniculiform at anthesis; branches elongating in fruit, to ca. 30 cm; bracts spatulate, margin incised-dentate. Corolla rose, funnelform, 3-4 mm; lobes ovate, ca. 1/2 as long as tube. Stamens slightly exserted. Style evidently exserted. Achenes sublanceolate, 2.5-3 × ca. 1 mm, glabrous; calyx segments ca. 5.5 mm. Fl. Jun-Jul, fr. Jul-Aug.
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