Volume 14 > Part 2 > Year 2019 > Page 334 > Malvaceae > Urena

2. Urena repanda Roxb. ex Sm.wfo-0001281682

Hort. Beng.: 51. 1814; in Rees, Cycl. 37: Urena no. 6. 1819; Mast. in Hook.f., Fl. Brit. India 1: 330. 1874; Gürke, Bot. Jahrb. Syst. 16: 381. 1892; Dunn, J. Linn. Soc. Bot. 39: 503. 1911; Y.Tang et al. in C.Y. Wu et al., Fl. China 12: 282. 2007.— Pavonia repanda (Roxb. ex Sm.) Spreng., Syst. 3: 98. 1886; Hochr., Annuaire Conserv. Jard. Bot. Genève 5: 144. 1901; S.Y.Hu, Fl. China, fam. 153: 78. 1955. Plate XXXI: G.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Perennial herb or subshrub 0.4–2.5 m tall; stellate hairy. Leaves ovate, upper leaves narrowly ovate to lanceolate, lower leaves shallowly 3-lobed, base subcordate or rounded, apex obtuse to acuminate, margin serrulate or serrate, upper surface slightly scabrous with short stiff stellate hairs, lower surface densely stellate-tomentose; basal veins (3–)5(–7), midvein beneath with gland near base, secondary veins 2–4 in each side of midvein. Petiole 0.5–6 cm long. Stipules linear, 4–5 mm long. Flowers crowded at ends of branches or branchlets or in raceme-like inflorecences. Peduncles 1–3 mm long. Epicalyx campanulate, 7–10 mm long, basal half connate, hirsute, glabrescent. Calyx equal or longer than epicalyx; lobes ovate, acute, persistent. Corolla pink. Petals obovate, 2.5–3.5 by ca 2 cm. Staminal column ca 2 cm long, glabrous. Ovary ovoid, ca 3 mm long, glabrous; style 10-branched, ca 2 mm long, papillose; stigmas discoid, ciliate. Schizocarp subglobose, ca 8 mm in diam., glabrous; mericarps obovoid-trigonous, 3–4 mm long, pinnately striate, smooth, glabrous.

Thailand : NORTHERN: Chiang Mai (Doi Suthep, Doi Chiang Dao, Hot, Mae Klang, Tat Noi), Chiang Rai (Chiang Khan), Phrae (Mae Yom), Tak (Bhumiphol Dam), Sukhothai (Muang Kao), Nakhon Sawan (Ta Khli); NORTH-EASTERN: Loei (Na Haeo), Nong Khai, Sakon Nakhon (Phuphan), Khon Kaen; EASTERN: Chaiyaphum, Nakhon Ratchasima (Pak Thong Chai); SOUTH-WESTERN: Kanchanaburi (Erawan, Sai Yok, Thong Phaphum); SOUTH-EASTERN: Chon Buri (Si Racha).

Distribution : N India, SW China.

Ecology : On rocky areas in deciduous forests, dry dipterocarp forests, on limestone hills, on wasteland, dry areas or fire-influenced open forests, up to 1,300 m alt. Flowering and fruiting: September–January.

Vernacular : Khi on yai (ขี้อ้นใหญ่), ya kong khao (หญ้าก่องเข้า)(Chiang Mai).