Scandent shrub or semi-climber, 1-6 m tall; stem ribbed, densely or more sparsely appressed pubescent when young, glabrescent, glandular. Leaves usually opposite or suboppposite, rarely alternate, deltoid-ovate or rhombic to hastiform, (10-)20-50 x (10-)15-40 mm, strongly 3-nerved from base, margins coarsely or sinuous-toothed, rarely entire, subacute to obtuse, base cuneate, decurrent on petiole, appressed puberulous and conspicuously gland-pitted, glabrescent, drying dark above and paler beneath, petiole 5-10 mm long. Capitula in cymose panicles on weakly ascending branches in upper axils, sweetly scented, ±10-flowered. Involucre campanulate, 4-5 mm diam., bracts 3-or 4-seriate, imbricate, thinly villous and glandular with membranous margins, ciliate, outer bracts narrowly ovate, acute, 2-3 mm long, inner elliptic-lanceolate, obtuse, 4-6 mm long, 3-veined. Florets pale mauve, lilac or pale pink to creamy white, 5.0-6.5 mm long, corolla tube narrowly funnel-shaped, lobes linear, up to 3 mm long. Anthers sagittate, ±2 mm long. Style up to 7 mm long, branches, ±3 mm long, pubescent on back. Cypselas narrowly turbinate, sharply 5-ribbed, 1.5-2.5 mm long, pilose and glandular; pappus biseriate, white, scales ±0.8 mm long, bristles ±5 mm long, acute.
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Perennial shrub, 1-6 m high; scandent or climber; branches usually opposite or subopposite, striate, puberulous, glandular. Leaves mostly opposite, membranous, petiolate; deltate-ovate, base truncate or abruptly cuneate and decurrent on petiole, apex subacute to obtuse, margins coarsely 3-9-toothed to sublobate; sparsely pilose to glabrescent on upper surface, puberulous beneath. Capitula many in moderately dense clusters; borne in upper leaf axils and terminal on branches; involucres obconic-campanulate; involucral bracts several-seriate, margins narrowly membranous, lamina puberulent outside. Florets sweetly scented; corollas pale mauve to creamy white. Flowering time July-Dec. Pappus of outer short, linear, seta-like scales, inner of white barbellate setae. Cypselae narrowly turbinate, sharply to narrowly 5-ribbed.
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