Shrub 1-3 (-5?) m tall. Leaves entire, either unifacial (subsp. didymobotrya ) or dorsiventral (subsp. involuta ). Unifacial leaves subterete to linear, 2.5-17 cm long, 0.5-1.3 mm wide; margins obscure; surface with 7-17 longitudinal ridges and appressed hairs in grooves. Dorsiventral leaves narrowly elliptic to obovate (rarely a few sublinear), 1-7 cm long, (1-) 3-7 mm wide; margins incurved to involute, occasionally enclosing upper surface; surfaces somewhat similar; lower surface with 7-11 longitudinal ridges and an open appressed indumentum. Conflorescence terminal and occasionally also axillary, erect, simple or paniculately 2-5-branched, sometimes with a little secondary branching; unit conflorescence cylindrical, 3.5-6 cm long, ±synchronous. Flowers acroscopic. Perianth sericeous outside, glabrous inside. Nectary inconspicuous and arcuate or sometimes absent. Pistil 3-6 mm long, glabrous; pollen-presenter erect to oblique, conical. Follicle mostly semiobcordate (cuneate in side view), often attenuate to style base, 5-8.5 mm long, glabrous, smooth, not viscid.
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