1. Gossypium arboreum Linnaeus, Sp. Pl. 2: 693. 1753.
树棉 shu mian
Subshrubs or shrubs, perennial, 2-3 m tall. Young branchlets villous. Stipules filiform, caducous; petiole 2-4 cm, puberulent and villous; leaf blade 3-5-lobed, 4-8 cm in diam., lobes oblong-lanceolate, oblong, ovate, or obovate, ca. 1/2 as long as leaf blade, abaxially stellate puberulent, villous along veins, adaxially stellate pilose. Flowers solitary, axillary. Pedicel 1.5-2.5 cm, villous. Epicalyx lobes 3, connate for basal 1/3, ovate-cordate or triangular, ca. 2.5 cm, stellate villous on veins, 3- or 4-toothed, teeth less than 3 × as long as wide. Calyx shallowly cup-shaped, nearly truncate. Corolla yellowish, often dark purple in center, campanulate; petals 3-5 cm. Staminal column 1.5-2 cm; filaments uniform in length. Capsule 3(or 4 or 5)-loculed, cone-shaped, usually pendulous, ca. 3 cm, glabrous, with numerous oily and glandular minute spots, apex tapering, beaked. Seeds 5-8 per cell, free, ovoid, 5-8 mm in diam., with white wool and moderately persistent short fuzz. Fl. Jun-Sep.
Cultivated. Guangdong, Guangxi, Sichuan, Taiwan, Yunnan [cultivated in tropical and subtropical regions of the Old World; origin in India and Sri Lanka].