pubescent on the undersurface, with plate-shaped glands along the midvein, mostly in axils of the lateral nerves, drying green to olive with the main nerves yellowish or contrastingly reddish, the terminal leaflet 9.5-37 cm long and 4.2-22 cm wide, the lateral leaflets 7-31 cm long; and 3.4-18 cm wide; terminal petiolule 1.8-9.5 cm long, lateral petiolules 1.1-4.8 cm long, petiole 2.5-18 cm long, glabrous to minutely scabrous as the petiolules; tendril simple 9-20 cm long. Inflorescence a short terminal or axillary, 1-12-flowered raceme, the pedicels 1-1.5 cm long, each with 2 narrow bracts, the rachis to 8 cm long, the rachis and pedicels sparsely stellate-puberulent. Flowers with an inconspicuous sweet-ish musky odor, calyx large, yellow when fresh, spongy, inflated-campanulate, more or less bilabiate, mostly glabrous with scattered plate-shaped glands, sparsely and inconspicuously thick-stellate and/or simple puberulent near the base, or rarely conspicuously stellate pubescent, 2.2-6.0 cm long and 1.2-4.2 cm wide; corolla bright yellow with red penciling in the throat (13 lines), tubular-campanulate, 5.5-11 cm long and 1.3-2.8 cm wide at the mouth, the tube 4.5-7.5 cm long, the lobes 1.2-3.2 cm long; sparsely and inconspicuously lepidote inside and out, glandular-pubescent inside from the level of stamen insertion to the top of the enlarged base; stamens didynamous, the anther thecae divaricate, 2-3 mm long, the filaments abruptly narrowed for the apical 2 mm, the longer pair 2.5-3.8 cm long, the shorter pair 1.5-2.3 cm long, the staminode 0.6-1.1 mm long, inserted 1.2-2.0 cm from base of corolla tube; pistil 5.2-5.7 cm long, the ovary ovate-cylindric, 3-4 mm long and 2.5-3.5 mm wide, narrowed slightly at the base, essentially glabrous, the ovules 8-seriate in each locule; disc annular-pulvinate, 2 mm long and 6-7 mm wide. Capsule oblong or elliptic-oblong, obtuse at the ends, the valves woody, flattened, 24-32 cm long and 6.0-11.5 cm wide, the surface smooth, glabrous with a wrinkled epidermis, drying blackish with scattered lighter inconspicuous lenticellate spots; seeds 2.5-4.3 cm long and 6.7-13 cm wide, the wings brown, thinly woody at the base to submem-branaceous at the tips, not distinct from the seed body.
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Liana to 7.5 cm in diameter, the bark light gray, smooth with scattered raised whitish lenticels; stem with 4 phloem arms in cross section; twigs sub-terete, light gray with large, widely scattered raised lenticels, the nodes without interpetiolar glandular fields, interpetiolar ridges, or noticeable pseudostipules. Leaves 3-foliolate or 2-foliolate with a tendril or an inconspicuous tendril scar; leaflets elliptic, acuminate, broadly cuneate to rounded, membranaceous to chartaceous, secondary veins 5-9 on a side, minutely papillose above and beneath with scattered lepidote scales, these sometimes deciduous above, pu-bescent beneath in the axils of lateral nerves, usually subpuberulous on main veins with simple and stellate trichomes, sometimes conspicuously dendroid
A creeper. It clings to other plants.
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