1. Disepalum petelotii (Merrill) D. M. Johnson, Brittonia. 41: 364. 1989.
窄叶异萼花 zhai ye yi e hua
Polyalthia petelotii Merrill, Univ. Calif. Publ. Bot. 13: 131. 1926; Enicosanthellum petelotii (Merrill) Bân; E. plagioneurum (Diels) Bân var. oblanceolatum (W. T. Wang) Bân; Uvaria oblanceolata W. T. Wang.
Shrubs or small trees, 2-7 m tall. Branches dark gray, longitudinally wrinkled, puberulent when young, glabrescent. Petiole 5-7 mm, appressed pubescent; leaf blade narrowly elliptic, oblong, oblong-lanceolate, or oblanceolate, 8-20 × 2-4.5 cm, membranous and translucent punctate when young, later papery, abaxially golden to rust-colored sericeous but glabrescent or with scattered appressed hairs with age, adaxially shiny green and glabrous, secondary veins 7-13 on each side of midvein, arcuately ascending, and slightly prominent on both surfaces, base cuneate to cuneate and decurrent onto petiole, apex acuminate and sometimes with a 1-2 cm acumen. Inflorescences terminal or sometimes leaf-opposed, 1-flowered. Flowers ca. 3 cm in diam. Pedicel 1-1.7 cm, ferruginous pubescent. Sepals ovate-triangular to subcordate, 1-1.2 × 0.8-1.2 cm, outside appressed pubescent, inside glabrous. Petals greenish to yellow with a purple base, oblong to rarely oblanceolate, 2-2.5 × 0.6-1.2 cm, subequal, outside sparsely puberulent or glabrous, inside glabrous, apex obtuse to acute. Stamens oblong, 2.2-2.7 mm; connectives apically broadly truncate, puberulent. Carpels 18-35, villous; ovules 1 or 2 per carpel, basal. Fruiting pedicel 2-5 cm; carpophore ± as long as monocarps, slender; monocarps to 20, dark purple when ripe, ellipsoid to cylindric-ellipsoid, 1.2-1.5 × 0.8-1 cm, ferruginous pubescent when young, glabrescent. Seeds 1 or 2, flat-ellipsoid, 10-13 × 6-8 mm. Fl. Mar-Nov, fr. Jul-Dec.
Forested slopes, often along moist valleys; 100-2000 m. Guangxi, S Guizhou, Hainan, SE Yunnan [N Vietnam].