1. Allomorphia curtisii (King) Ridley, J. Straits Branch Roy. Asiat. Soc. 57: 40. 1911.
翅茎异形木 chi jing yi xing mu
Oxyspora curtisii King, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 69: 9. 1900; Allomorphia eupteroton Guillaumin; A. laotica Guillaumin; A. procursa Craib.
Shrubs 1.7-2.5 m tall. Branchlets puberulous 4-winged, wings 1-4 mm wide. Petiole 1.5-10 cm, winged, wings 3-9 mm wide; leaf blade ovate to elliptic, 10-25 × 5-16 cm, abaxially minutely furfuraceous on veins, adaxially subglabrous when mature, secondary veins 2 on each side of midvein, abaxially prominent, and adaxially depressed, base attenuate to rounded, margin obtuse serrulate, apex shortly acuminate. Inflorescences 10-25 cm, ca. 10 cm wide at base, to 30 × 30 cm in fruit; peduncle 4-angled or 4-winged. Flowers clustered in small umbels near apex of inflorescence branchlets. Bracts and bracteoles minute, deciduous. Flowers 4-merous. Pedicel to 1.5 mm. Hypanthium cylindric, 5-8 mm, apically barely 8-ribbed, puberulous or glabrous. Calyx rim with 4 cusps to 0.5 mm. Petals pinkish or white, ca. 3 × 3 mm. Stamens 8, subisomorphic, 5-7 mm; anthers white or sometimes pinkish, 4-5 mm, with short spurs at base. Capsule suburceolate to cylindric, 6-8 mm, crowned by persistent 8-angled calyx rim.
Monsoon forests; 200-1200 m. Yunnan [Laos, Malaysia, Thailand, Vietnam].