木姜叶暗罗 mu jiang ye an luo

Trees to 40 m tall. Bark grayish brown. Branches brown, glabrous. Petiole 6-10 mm, adaxially furrowed, glabrous, [with axillary bud at base]; leaf blade elliptic to broadly elliptic, 9-20 × 4.5-8 cm, membranous to subleathery, both surfaces glabrous and densely papillose, secondary veins 10-16 on each side of midvein, reticulate veins elevated on both surfaces, base rounded to broadly cuneate, apex shortly acuminate to obtuse. Inflorescences axillary, 1-flowered. Pedicel 2-3.5 cm, glabrous. Sepals triangular-lanceolate, ca. 12 mm, outside puberulent, inside glabrous. Petals broadly linear, 6-9 × 0.7-1.1 cm, subequal, glabrous, margin slightly revolute, with a midrib and 2-4 parallel secondary veins. Stamens many, ca. 1.5 mm; connectives apically truncate. Carpels 5 or 6, glabrous; ovules 3 per carpel; stigmas clavate, puberulent. Monocarp stipes 1-3 cm; monocarps oblong to ovoid, 3-3.5 × 2-2.5 cm, constricted between seeds, glabrous, verrucose. Seeds 3 per monocarp. Fl. Apr-Jul, fr. May-Sep.

● Sparsely forested slopes, moist valleys; ca. 600 m. S Yunnan.

Polyalthia litseifolia is listed as Endangered (EN A2c) by the IUCN Red List of Threatened Species (Version 2010.3; http://www. iucnredlist.org; accessed on 7 Oct 2010).