Description from Flora of China
Strobocalyx chunii (C. C. Chang) H. Robinson et al.
Scandent shrubs. Stems inconspicuously striate, fulvous tomentulose, mixed with glands. Leaf blade oblong or elliptic-oblong, rarely ovate, 7-13 × 2.8-5.7 cm, papery, gray or fulvous tomentulose except on veins, lateral veins 3-6-paired, adaxially prominent, veinlets reticulate, base rounded or attenuate, margin entire or repand, apex shortly acute, rarely rounded-obtuse. Synflorescences terminal, panicles broad. Capitula many, 3-5 mm in diam.; peduncles to 2 mm, fulvous tomentulose; bracteole 1, at base. Involucre tubular, 4-5 mm; phyllaries 4-6-seriate, midrib often purple, thinly leathery, ovate to oblong, 1-veined, dorsally and margin tomentulose, apex obtuse, rarely acute, outer short, ovate, 1-1.5 mm. Receptacle flat, subfoveolate. Florets 2 or 3; corolla violaceous, tubular, 5-6 mm, lobes linear-lanceolate, glabrous. Achenes suboblong, ca. 2.5 mm, inconspicuously 5-ribbed, glabrous, glandular. Pappus 2-seriate, white or dirty white; outer setae very short; inner setae ca. 6.5 mm, scabrid. Fl. and fr. Jul-Oct.
● Forests on slopes in valleys. Hainan.