Description from Flora of China
Conyza pyrifolia Lamarck, Encycl. 2: 89. 1786; C. syringifolia Meyen & Walpers; Erigeron pyrifolius (Lamarck) Bentham; Microglossa volubilis Candolle.
Vines, woody, 0.7-3 m tall, climbing. Stems divaricately branched, striate, villosulous, densely minutely stipitate glandular, glabrescent. Leaves abaxially pale green, adaxially green, ovate, 5-10 × 2.5-4 cm, abaxially densely stipitate glandular, veins densely ferruginous villosulous, adaxially scabrid, base attenuate, margin undulate, crenulate, ciliate, veins pronounced, apex acuminate, mucronate. Capitula 5-6 mm in diam., numerous in axillary or terminal, dense compound-corymbiform synflorescences. Involucre campanulate; phyllaries 4- or 5-seriate, membranous, midvein brown, apex obtuse, ± erose, outer ovate-lanceolate, 0.7-2 mm, abaxially sparsely villosulous, stipitate glandular, midvein pronounced, distally enlarged, middle and inner linear-lanceolate, 2-5 mm, margin hyaline, midvein thin, glabrous, middle sometimes ± stipitate glandular, inner eglandular. Receptacles convex. Ray florets numerous, lamina filiform, ca. 1 mm; disk florets yellow, ca. 5 mm, tube and limb base hairy, limb funnelform, ca. 2.5 mm, lobes 5, linear-triangular, ca. 1 mm. Achenes obovoid, slightly compressed, ca. 1 mm, 3- or 4-ribbed, sometimes veined, sparsely strigillose, stipitate glandular apically. Pappus 2- or 3-seriate, of cinnamon to reddish or white, thin bristles, outer 0-2, ca. 1 mm, inner ca. 4 mm, tapering, innermost 4.2-4.5 mm, slightly clavate. Fl. and fr. year-round.
Thickets on slopes, open forests, forest margins, stream banks, wastelands, edges of bamboo plantations; sea level to 1800 m. Guangdong, Guangxi, Guizhou, Hainan, Taiwan, Yunnan [Bangladesh, Bhutan, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, N Thailand, Vietnam; Africa].