Straggling or shrubby herb 0.9–3.5 m. tall, with stems and peduncles covered with crisped violet or ferruginous hairs. Leaf-blades elliptic to oblong-ovate, 3.5–15 cm. long, 3.7–6.5 cm. wide, acuminate at the apex, rounded to cuneate at the base, hairy above and on the venation beneath; petiole 2–3 cm. long; stipules with 4–7 filiform pubescent capitellate setae 6–10 mm. long. Inflorescences lax, trichotomous, ± 9–12 cm. long and wide, sessile or pedunculate; bracts filiform, ± 1 cm. long, scattered on the branches. Calyx-lobes very unequal, the foliaceous one white, elliptic to rounded-ovate, 0.7–1.3 cm. long, 3.5–9.3 mm. wide, mucronate or acuminate, membranous and markedly venose, pubescent on the nerves, with the stipe 5 mm. long; other lobes filiform, 6–7 mm. long, deltoid basally and slightly connate above the disc, coarsely reticulate, hairy. Corolla white to mauve or pale violet; tube 1.2–1.6 cm. long, dilated at the apex for 3–4 mm. in long-styled flowers; lobes 2–4 mm. long, pubescent outside, especially at the apex. Style exserted for ± 4 mm. in long-styled flowers. Fruit 2.5 mm. long, 3 mm. wide, ribbed, the beak a little raised and the connate parts of the calyx-lobes patent, forming a horizontal nervose flange; dehiscence entirely apical. Seeds ± 0.5 mm. long. Fig. 21, p. 185.
