Plants 0.6-4 m. Stems: branches yellow, red, or violet, not to strongly glaucous (slightly glossy), pilose; branchlets yellow-green or red-brown, pilose to villous (inner membra-naceous bud-scale layer free, separating from outer layer). Leaves: stipules foliaceous, apex acute; petiole convex to flat, or shallowly grooved adaxially, 3-8-17 mm, pilose or villous adaxially; largest medial blade narrowly oblong, oblong, or elliptic, 21-57-99 × 6-20-37 mm, 1.9-2.9-5 times as long as wide, base rounded, convex, subcordate, or cordate, margins flat or slightly revolute, entire or serrulate (with relatively short, slender teeth), apex acuminate, acute, or convex, abaxial surface not glaucous, pilose, short-silky, or densely woolly-tomentose to glabrescent, hairs wavy, adaxial dull or slightly glossy, sparsely to densely silky-tomentose, midrib remaining hairy; proximal blade margins entire or serrulate; juvenile blade yellowish green, very densely long-silky or woolly abaxially, hairs white (sometimes yellowish). Catkins flowering as leaves emerge; staminate stout or subglobose, 9.5-36.5 × 7-15 mm, flowering branchlet 1.5-7 mm; pistillate densely or moderately densely flowered, stout or subglobose, 11-51 × 8-16 mm, flowering branchlet 2-12 mm; floral bract brown or black, 1.4-2.8 mm, apex rounded or acute, abaxially hairy, hairs straight or wavy. Staminate flowers: adaxial nectary narrowly oblong to oblong, 0.5-1.1 mm; filaments distinct, glabrous or hairy basally; anthers yellow or purple turning yellow, 0.5-0.9 mm. Pistillate flowers: adaxial nectary narrowly oblong to oblong, 0.5-1.1 mm, longer than or equal to stipe; stipe 0.2-1.6 mm; ovary pyriform, short-or long-silky to glabrescent, beak gradually tapering to or slightly bulged below styles; ovules 12-16 per ovary; styles 0.5-1.5 mm; stigmas flat, abaxially non-papillate with rounded tip, slenderly or broadly cylindrical, or 2 plump lobes, 0.18-0.39-0.76 mm (evidentially two size classes). Capsules 4-10 mm. 2n = 76.
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