51. Machilus duthiei King ex J. D. Hooker, Fl. Brit. India. 5: 861. 1890.
长梗润楠 chang geng run nan
Persea duthiei (King ex J. D. Hooker) Kostermans.
Trees, usually 3-8 m tall, sometimes up to 30 m; trunk 25-30(-50) cm d.b.h. Branchlets glabrous. Petiole 1-2 cm, glabrous; leaf blade oblong or elliptic-lanceolate to obovate-lanceolate, 6.5-20 × 2.5-5 cm, leathery, abaxially slightly sericeous-puberulent when young, glabrous on both surfaces when old, midrib abaxially elevated, adaxially impressed, lateral veins 12-18 pairs, ± conspicuous on both surfaces, veinlets slightly foveolate on both surfaces, base attenuate, apex acuminate to long acuminate, summit usually falcate. Cymose panicles arising from lower part of current year branchlet, 5-13 cm; peduncle 3-6 cm, sericeous-puberulent. Pedicel 8-12 mm. Flowers yellowish green, 6-7 mm. Perianth lobes oblong, sericeous-puberulent on both surfaces. Filaments of perfect stamens pubescent at base; glands of 3rd series stipitate. Staminodes ca. 2.5 mm, pubescent. Ovary globose, glabrous; style slender, to 3.5 mm. Fruit globose, ca. 7 mm in diam.; fruiting pedicel puberulent. Fl. May-Jun, fr. Aug-Oct.
Mountain valleys, mixed forests. SW Sichuan, S Xizang, C and NW Yunnan [Bhutan, India, Kashmir, Nepal].
This species was misidentified in FRPS (31: 49. 1982) as Machilus longipedicellata Lecomte. The present authors treat M. longipedicellata as a synonym of M. yunnanensis var. yunnanensis.