Climber, twigs terete, densely brown short-tomentose, glabrescent, internodes (1½-)2-4(-6) cm. Leaves oblong, 2-2.5 times as long as broad, 4-5.5(-8) by 1.5-2.5(-3.5) cm; base acute to rounded, glands at the base and margin sometimes wanting; top acuminate; nerves c. 4 pairs; surfaces densely haired in the youth, glabrescent except the basal part of the midrib, shiny above; petiole 5(-9) mm, densely fulvous-pubescent, glabrescent. Inflorescences mostly axillary, 4-7 cm long, dense-flowered, strongly haired. Bracts are thickly haired pimples. Pedicels 1.5-2 cm, halfway articulated, lower part with the minute or abortive bracteoles, upper part thickened towards the flower, with the oblong, 1-3 mm long gland sunken in it, often a bit curved around the gland (Fig. 5b). Flowers white. Sepals elliptic-ovate, c. 2 by 1.5 mm, with rounded top, outside densely haired, inside glabrous. Outer petal elliptic, inner one orbicular, 6-8 by 4-5 mm, margin irregularly fimbriate, outside densely haired, inside glabrous. Long filament 10-12, other ones 5-7 mm long. Style glabrous, acute. Central wing of the samara (2-)3-4 by 0.75-1.25 cm, lateral wings 1.5-2 cm long, all variable in shape.
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