粘毛黄花稔 nian mao huang hua ren

Sida glutinosa Roxburgh, Fl. Ind., ed. 1832, 3: 172. 1832, not Cavanilles (1785); S. urticifolia Wight & Arnott (1834), not A. St.-Hilaire (1829); S. wightiana D. Dietrich.

Herbs subshrublike, erect, to 1 m tall. Stem with minute stellate hairs, multicellular glandular hairs, and long simple hairs. Stipule filiform, ca. 5 mm; petiole 1-3 cm, pilose; leaf blade ovate-cordate, 3-6 × 2.5-4.5 cm, viscid-stellate on both surfaces with minute stellate hairs and multicellular glandular hairs, base cordate, margin crenate, apex acuminate. Flowers solitary or paired, axillary or subterminal, often on congested reduced axillary shoots. Pedicel slender, 2-6(-15) mm, articulate at or above middle. Calyx widely campanulate, 6-8 mm, sparsely pilose with long hairs, lobes 2.5-3 × ca. 2.5 mm, acute or acuminate. Corolla yellow, 1-1.2 cm in diam.; petals obtriangular, glabrous. Filament tube strigose. Schizocarp nearly globose, 3-4 mm in diam.; mericarps 5, ovoid-tetrahedral, ca. 2.5 mm, smooth, apex shortly hairy, not awned, shortly acute, enclosed in persistent calyx. Seeds ovoid, slightly 3-sided, ca. 2 mm, glabrous.

Forest margins, slopes, grassy roadsides. Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Cambodia, India, Indonesia, Laos, Philippines, Thailand, Vietnam].

Sida mysorensis is often confused with the closely related species S. javensis Cavanilles and S. cordata (N. L. Burman) Borssum Waalkes but can usually be distinguished by the presence of glandular hairs and the erect habit.