A climbing shrub. Extremities slender, silky-pilose at first. Leaves opposite, firmly membranous, broadly elliptical or ovate-elliptical, broadly pointed or subacute, broadly rounded or even subcordate at the base, without apparent basal glands, glabrous or glabrescent above, appressed silky-pilose beneath, 3-5 in. long, 2-3 in. broad; petiole 1/2 in. (1/4- 3/4 in.). Flowers in terminal and axillary panicles, white. Pedicels in opposite pairs or corymbosely fascicled, 1/2 in. or less; bracteoles minute at or near the base.
Extremities slender, terete, glabrous, ashen-grey, about the thickness of a crow-quill, with long internodes; at first with a deciduous rusty pubescence. Leaves opposite, elliptical, very shortly apiculate, rounded at the base, glabrous, rather firmly membranous or slightly fleshy, with obscure venation, about 2 in. long by 1-1 1/4 in. broad in the only specimen seen. Flowers in terminal panicles; pedicels slender, in few-flowered umbels, with a pair of minute, subopposite, ovate-anceolate bracteoles below or near the middle, pilose as is also the base of the calyx. Lamina of the petals fimbriate below. Dorsal wing of the nuts deeply 2-fid above, 3/4-1 in. long and broad, with radiating anastomosing nervures.
Branches terete, pilose, with closely appressed hairs, glabrescent. Leaves opposite, membranous, elliptical or ovate-elliptical, acute or acuminate, broadly rounded below, undulate-denticulate, glabrate and opaque above, more or less silky-pilose with appressed hairs beneath, 3-4 in. long, 1 1/2-2 1/2 in. broad; petioles 1/4- 1/3 in., with leafy semicircular or reniform stipular appendages, glabrescent above, silky beneath. Flowers very numerous, in large, terminal, leafy panicles. Pedicels umbellate or in umbellate corymbs, slender, 3/4-1 in.; bracteoles very minute. Calyx-lobes ovate-oblong. Lamina of petals fimbriate below. Styles elongate, compressed, with a prominent nerve or 3-gonous. Fruit not seen.
Extremities terete, rusty-tomentose, glabrescent. Leaves opposite, ovate-oblong, subcordate, acute, crenulate-serrate or nearly entire, with thinly scattered hairs above, villous-tomentose beneath; petiole 1 1/2 in. Flowers in corymbose racemes, collected in a terminal panicle, with divaricate branches; pedicels filiform, 1 in. or less, with a pair of minute bracteoles below or near the middle. Calyx 5-partite, with lanceolate, obtuse, silky-villous lobes. Petals unguiculate, 2 with fimbriate margins. Styles 3, filiform. Each samara with a dorsal wing, 2-fid or 2-lobed above and below.
Undershrub, not at all or very rarely scandent. Branches straight, about the thickness of a crowquill, closely rusty-tomentose. Leaves opposite or in verticils of 3 (or 4), oblong-lanceolate or oblong, subacute or rather obtuse, cuspidate or mucronate, more or less rounded at the base, appressed-pilose more or less above, silky-pilose or pilose-lanate beneath, subsessile or very shortly petiolate, with a pair of minute glands at the insertion of the petiole (Dr. Welwitsch), 1 1/2-2 in. long, 5-8 lines broad. Flowers in 3-4-flowered pedunculate umbels from the axils of the upper leaves, often forming a large loose panicle; flower-bearing lateral branches 1-2 1/2 in., usually bearing a pair of small leaves at or near the base of the umbels. Pedicels 1/2-1 1/2 in., with a pair of scale-like bracts above or near the middle. Flowers 1/2- 3/4 in. in expansion. Sepals obovate-oblong, eglandular or glands not apparent when dry. Petals shortly unguiculate; lamina crisped-denticulate. Filaments subulate, very shortly united at the base. Ovary densely hairy. Fruit-carpels with an ascending obliquely oblong or obovate-oblong, obtuse, appressed-silky wing, about 3/4 in. long and 4-5 lines broad.