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FOC | Family List | FOC Vol. 12 | Sterculiaceae | Pterospermum

1. Pterospermum acerifolium (Linnaeus) Willdenow, Sp. Pl. 3: 729. 1800.

翅子树 chi zi shu

Pentapetes acerifolia Linnaeus, Sp. Pl. 2: 698. 1753

Big trees; bark smooth. Branchlets densely velutinous when young. Stipules linear; petiole robust, striate; leaf blade nearly orbicular or oblong, sometimes ± lobed, 24-34 × 14-29 cm, leathery, abaxially densely yellowish and gray stellate velutinous, adaxially sparsely hairy or glabrous, base cordate, margin entire or crenate, apex truncate, nearly rounded, or pointed; juvenile leaves palmately lobed, peltate. Flowers solitary, fragrant; epicalyx lobes fimbriate or palmately divided. Sepals linear-oblong, ca. 9 × 0.7 cm, abaxially densely yellow-brown stellate velutinous, adaxially white villous. Petals white, linear-oblong, slightly cuneate, slightly shorter than sepals, glabrous. Staminodes clavate, hairy. Ovary oblong, 5-angular; ovules many per locule. Capsule woody, cylindrical, stipitate, obscurely 5-grooved, 10-15 × 5-5.5 cm, reddish brown velutinous, glabrescent, base tapering, apex rounded. Seeds many per locule, obliquely ovate, flat, wing large and thin, brown, smooth.

Forested slopes; 1200-1700 m. S Yunnan [Bangladesh, Bhutan, India, Laos, Malaysia, Myanmar, Nepal, Thailand].

Pterospermum acerifolium is grown as an ornamental.


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