10. Sida yunnanensis S. Y. Hu, Fl. China, Malvaceae. [Fam. 153], 16. 1955.
云南黄花稔 yun nan huang hua ren
Sida yunnanensis var. longistyla J. L. Liu; S. yunnanensis var. viridicaulis J. L. Liu; S. yunnanensis var. xichangensis J. L. Liu.
Subshrubs erect, to 1 m tall. Branchlets stellate puberulent. Stipule filiform, ca. 5 mm; petiole 3-7 mm, stellate; leaf blade obovate, elliptic, or orbicular, 1-4 × 0.5-3 cm, abaxially stellate tomentose, adaxially sparsely minutely stellate puberulent to glabrous, base obtuse, margin dentate, apex obtuse to acute. Flowers subterminal, ± apically congested, mostly on reduced axillary shoots. Pedicel 3-4 mm at anthesis, to 1.5 cm in fruit, stellate puberulent, apically articulate. Calyx ca. 4 mm, minutely stellate puberulent, lobes triangular, acute to slightly acuminate. Corolla yellow, ca. 1 cm in diam.; petals obovate-lanceolate, ca. 8 mm. Filament tube usually hirsute. Mericarps 5-7, with vertical grooves, 3-4 mm, densely stellate, usually apically 2-awned. Fl. autumn-winter.
● Scrub on slopes, grassy roadsides. Guangdong, Guangxi, Guizhou, Sichuan, Yunnan.
The original author suggested that Sida yunnanensis was related to S. spinosa Linnaeus, but it is distinguished by the broadly elliptic or obovate leaf blades (ovate-lanceolate in S. spinosa), shorter petioles (3-7 mm as opposed to 2-20 mm in S. spinosa), and the absence of the short nodal spines characteristic of S. spinosa. Paul (Fl. India 3: 290. 1993) included S. yunnanensis within S. rhombifolia var. rhombifolia, while Abedin (Fl. W. Pakistan 130: 81. 1979) accepted it and extended it to include material from India, Kashmir, Myanmar, and Pakistan.