Large woody climber. Branchlets glabrous to densely puberulent; sparsely lenticellate. Leaves: petiole 5-14 mm long, glabrous to puberulent; blade coriaceous, 2.1-13 by 1-6.3 cm, 1.5-4 times as long as wide, elliptic to obovate, apex rounded to shortly and bluntly acuminate, base cuneate, glabrous above, very sparsely puberulent to glabrous beneath, 6-14 pairs of secondary veins, ascending, anastomosing into a lopped intramarginal vein, tertiary venation reticulate, mostly prominent above and beneath. Inflorescence of terminal and axillary cymes, 3-13 cm long; peduncle 2.3-6.5 cm long, glabrous or sparsely puberulent; pedicels 2.7-16 mm long, glabrous to sparsely puberulent. Sepals 1-2 by 0.7-1.8 mm, 1.2-2 times as long as wide, ovate, apex acuminate to obtuse, glabrous, ciliate. Corolla white or greenish white; tube 6-10 mm long, 1.4-2.3 mm wide around stamens, 4.3-6.3 times as long as sepals, 1-1.5 times as long as lobes, glabrous outside, pubescent only immediately behind anthers inside, glabrous or hairs behind anthers visible in 5 patches in throat; lobes 4-8.5 by 1.8-5 mm, 1.2-2.2 times as long as wide, obdeltoid, glabrous outside and inside. Stamens inserted at 5.2-8.2 mm from corolla base which is 0.7-0.8 of tube length; anthers 2.7-3.3 by 0.6-0.8 mm, slightly exserted from corolla mouth. Disk of 5 free lobes or partially fused, 0.5-0.8 mm high. Ovaries 0.8-1.2 mm high, glabrous; style 4.6-7.7 mm long; style head 1.3-1.7 mm long. Fruit terete to slightly flattened, 7-27.5 cm by 3-6 mm, glabrous. Seeds 18-35 by 1.5-3 mm; coma 2-3.6 cm long.
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Lianas woody, to 10 m, glabrous or pubescent when young. Petiole 2-10 mm; leaf blade elliptic, narrowly ovate, or subobovate, 2-10 X 1-5 cm, membranous to papery, base acute or broadly cuneate, apex obtuse to acute, rarely caudate; lateral veins 6-10 pairs. Cymes terminal and axillary. Sepals appressed to corolla tube, 1.5-3 mm, puberulent to glabrous outside, apex obtuse to subacute; basal glands 10. Corolla white, tube 6-10 mm, dilated at throat, glabrous or puberulent inside facing stamens; lobes obovate, as long as tube. Stamens inserted at or near corolla throat; anther apex exserted or slightly so; disc scales shorter than to as long as ovary. Ovary glabrous. Follicles linear, 10-30 cm X 3-5 mm. Seeds oblong, 2-2.5 cm, coma to 3.5 cm. Fl. Apr-Jul, fr. Aug-Nov. 2n = 20.
A woody climber. It can be 4.5-6 m long. It spreads 3 m wide. The leaves are dark green and glossy. They are oval shaped and 5 cm long. The flowers are small and cart wheel shaped. They are creamy-white but turn yellow with age. The plant produces a sweet smell.
Thickets in hills and low mountains, C. and S. Japan. Growing in scrub and climbing up trees in the forest. Dense or open montane forests, brushwoods, often clinging to trees at elevations of 100-1,000 metres in southern China.
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It is a warm temperate plant. It is tolerant of light frost. It can grow in sun or shade. It suits hardiness zones 8-10.
Thickets in hills and low mountains, C. and S. Japan. Growing in scrub and climbing up trees in the forest.
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