Herbs, ascending, to 1 m tall; stems moderately villous or hispid. Leaves in subequal pairs; petiole 1.5-4(-7) cm, densely pilose or hispid; blade drying thinly papery, gray or olive-green, ovate or broadly ovate, 7-17 × 3.5-7 cm, sparsely hispid on both surfaces or moderately so abaxially, base obtuse, decurrent, often oblique, margins subentire, apex acuminate; secondary veins 9-14 pairs; stipules sublanceolate, markedly contracted above, pilose, ciliate, acuminate. Inflorescence congested-cymose, many flowered, villous; peduncle 1.5-2 cm; bracts linear, 3-4 mm, ciliate, persistent. Flowers distylous, subsessile. Calyx pilose; hypanthium subturbinate, ca. 1 mm, 5-ribbed; lobes subtriangular, ca. 0.5 mm, usually with 1 gland in each sinus. Corolla pale purple or white, slenderly tubular, sparsely pilose or hispid outside; tube 10-12 mm, inside with white villous ring near middle; lobes ovate-triangular, ca. 1 mm. Capsules ca. 2 × 5 mm, pilose or hispid.
Home