Plants 0.01-0.04 m, usually forming clones by layering or rhizomes. Stems erect, decum-bent, or trailing; branches red-brown, glabrous; branchlets yellow-brown or red-brown, glabrous. Leaves: stipules absent or rudimentary on early ones, foliaceous on late ones; petiole 1.5-4.9-14 mm; largest medial blade amphistomatous or hemiamphistomatous, elliptic, subcircular, or circular, 8-25 × 4-22 mm, 0.8-2.3 times as long as wide, base convex or rounded, margins slightly revolute, entire, sometimes ciliate, apex rounded or convex, abaxial surface glabrous, adaxial slightly glossy, glabrous; proximal blade margins entire; juvenile blade (reddish), glabrous, often ciliate. Catkins: staminate 5.5-14 × 5-10 mm, flowering branchlet 1-6 mm; pistillate moderately densely flowered, globose, subglobose, or stout, 8-29 × 6-14 mm, flowering branchlet 1.5-20 mm; floral bract brown, 1-1.8 mm, apex rounded, abaxially sparsely hairy or ciliate, hairs straight or wavy. Staminate flowers: abaxial nectary 0.6-1 mm, adaxial nectary narrowly oblong to ovate, 0.6-1.3 mm, nectaries distinct; filaments distinct; anthers ellipsoid to globose, 0.4-0.6 mm. Pistillate flowers: abaxial nectary absent, adaxial nectary narrowly oblong, ovate, or irregularly square, 0.6-1.4 mm, longer than stipe; stipe 0.2-1 mm; ovary obnapiform, not glaucous, usually glabrous, sometimes pubescent or short-silky, with hairs in patches or streaks, beak abruptly tapering to styles; ovules 9-18 per ovary; styles connate or distinct 1/2 their lengths, 0.5-1.4 mm; stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.24-0.32-0.4 mm. Capsules 3-5 mm.
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