隐翼木 yin yi mu

Crypteronia glabra (Wallich) Blume; C. pubescens (Wallich) Blume; Henslowia glabra Wallich; H. pubescens Wallich.

Trees (8-)12-30(-36) m tall, (10-)50 cm in diam. Bark brown to gray-brown; twigs glabrous. Petiole (2-)5-10 mm; leaf blade elliptic to oblong or ovate-oblong, (6-)7-17(-21) × 3-7(-12) cm, glabrous or puberulous, usually finely and distinctly reticulate abaxially, lateral veins 6-8(-10) pairs, base rounded to cuneate, apex acuminate to cuspidate, acumen usually obtuse, sometimes acute. Panicle axillary and/or terminal, ± pendulous, (9-)15-25(-30) cm, without definite peduncle; bracts of axes usually caducous, triangular or narrowly triangular, (0.5-)1-6 mm. Flowers many, up to 150, dense. Pedicels 1-3 mm. Receptacle ca. 0.5 mm high, puberulous. Sepals 5, triangular, ca. 1 mm. Stamens 5, reduced and mostly permanently inflexed in female flowers, (2-)3-5 mm, glabrous. Ovary subglobose, 0.5-1.5 mm in diam., 2(or 3)-loculed, puberulous to papillose; ovules inserted on septa; style simple or shortly lobed. Capsule 2-3 mm, ± laterally compressed; valves 2. Fl. Jul-Aug, fr. Sep-Nov.

Humid rain forests; 300-1300 m. S Yunnan [Bangladesh, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam].

This is a rare tree species threatened by slash-and-burn agriculture and poor regeneration from its tiny seeds.