Shrub (or tree to 16 m high). Branchlets rusty-tomentose to-flocculose. Leaves distinctly petiolate; lamina ovate to elliptic, 2–8 cm long, entire, rounded to acute, smooth and glabrous adaxially, tomentose abaxially (sometimes glabrous in var. lawrenceana). Flowers 1–3 (–7), pendulous, axillary or terminal; peduncle thick or slender, 0.5–5 cm long, with terminal bracts small and caducous; pedicels 5–10 mm long, with bracteoles filiform and usually caducous. Calyx shallowly hemispherical to deeply cup-shaped, thin, ±glabrous to densely ferruginous-tomentose. Corolla cylindrical, 1.2–5 cm long, greenish yellow to red; lobes short, incurved or erect. Stamens exserted; filaments narrowly linear throughout; anthers narrowly cuneate, 2–3 mm long, with margins prominently reflexed after dehiscence and obscuring the narrow connective.
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