Vines, to 4 m; stems densely hirsute and/or hirtellous, pilosulous, or tomentulose to glabrescent, drying brown. Leaves opposite; petiole 2-8(-21) cm, densely hirsute or hirtellous to glabrescent; blade drying submembranous to papery, ovate, oblong-ovate, lanceolate, rhombic-ovate, or oblong, 6-18(-22) × 2.5-10(-13) cm, adaxially sparsely to densely strigillose, hirtellous, hirsute, or scabrous, abaxially sparsely to densely pilosulous to hirtellous with pubescence denser on veins, base rounded or truncate to cordulate or usually cordate, margin flat or usually densely finely crisped and often appearing denticulate, apex acute to long acuminate; secondary veins 5-10 pairs; stipules generally persistent, triangular to lanceolate, 5-12 mm, acute to acuminate. Inflorescences axillary and/or terminal, paniculate to racemiform, cylindrical to narrowly pyramidal, 7-20(-30) cm, branched to 2-4 orders, densely hirtellous, pilosulous, or hirsute, pedunculate; bracts triangular to linear, 1-3 mm; pedicels to 1 mm. Flowers sessile to pedicellate in congested cymules or small heads. Calyx puberulent to glabrous; hypanthium portion ellipsoid to turbinate, 1-1.6 mm; limb lobed nearly to base; lobes triangular, 0.4-1 mm. Corolla pinkish gray, lilac gray, grayish white, or purplish green, tubular-funnelform, outside densely mealy tomentose or mealy puberulent; tube 4-10 × 2.5-4.5 mm, without slits; lobes broadly triangular to broadly ovate, 1-2 mm, obtuse to acute. Fruit globose, 4.5-5 × 4.5-5 mm, puberulent to glabrous, drying straw-yellow; pyrenes plano-convex to concavo-convex. Fl. Apr-Aug, fr. Aug-Nov.
Home