Morphological characteristics
Perennial climbing herbs, rhizome woody, thick, 1.5 cm in diameter. Stems elongated, curved, 2-5 meters long, much branched, pubescent or glabrous, woody when old, pale skin. Leaves stipitate, leaf blade ovate-lanceolate to long triangular, 2.5-12 cm long, 2-4.5 cm wide, apex acuminate, base broadly cuneate, truncate, slender or sparsely cordate, usually shallowly or Dorsal teeth, sparsely entire, sometimes lobbed or pinnately lobed, with at least 1-3 pairs of smaller lateral lobes to base, both surfaces pubescent to glabrous; pinnate veins, lateral veins 7-9 pairs , arcuate, veins conspicuous; petiole 0.5-1(-2) cm long, pilose or subglabrous, no ears or small ears at base; upper leaves smaller, lanceolate or linear-lanceolate, acuminate . Inflorescences ligulate, mostly culminate in terminal stem clusters into terminal panicles; branches and peduncles densely to sparsely pubescent; peduncles 1-2 cm long, bracteate, small Sepals usually 1-10, linearly subulate. Indicating cylindrical cylindric, 5-8 mm long, 3-6 mm wide, with outer bracts; bracts ca. 8, linearly drilled, 2-3 mm long. Sepals 12-13, linear-lanceolate, acuminate, margin hairy pubescent on upper and upper margins, herbaceous, margin broad dry membranous, abaxially pubescent or glabrous, 3-veined. Ray florets 8-10, tube length 4.5 mm; tongue yellow, oblong, 9-10 mm long, 2 mm wide, blunt, with 3 serrate teeth, 4-veined; tubular flowers mostly; corolla yellow, long 7.5 Mm, tube length 3.5 mm, caudal funnelform; lobes ovate-oblong, pointed, papillate at upper end. Anther length 2.3 mm, base blunt; ear length approx. 1/7 of the neck of the anthers; attachments ovate-lanceolate; anthers neck elongate, slightly dilated toward base; style branches 1.8 mm long, apical truncate , There is papillary hair. Achene cylindrical, 3 mm long, pubescent; crested white, 7.5 mm long.
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