披针叶杜英 pi zhen ye du ying

Elaeocarpus serrulatus Bentham.

Trees to 20 m tall. Bark gray-black; branchlets glabrous; terminal buds gray puberulent. Petiole black when dry, 1-2.5 cm, glabrous, swollen at upper end; leaf blade oblong, broadly elliptic, or elliptic, 9-15 × 3-4.5 cm, thinly leathery, not glandular, glabrous, lateral veins 7 or 8 per side, prominently raised abaxially, conspicuous adaxially, veinlets conspicuous on both surfaces, base cuneate, ± decurrent, margin conspicuously crenate, apex acuminate or caudate-acuminate, acumen 1.5-2 mm. Raceme 7-10 cm; peduncle pubescent. Pedicel 6-7 mm. Flowers bisexual. Sepals 5, lanceolate. Petals 5, slightly shorter than sepals, margin ciliate, laciniate. Stamens 15; anthers not awned but ciliate at apices. Disk 5-lobed, each 2-lobed again, pubescent. Ovary pubescent, (2 or)3-loculed. Drupe ovoid, 3-4 × 2-2.5 cm; exocarp inconspicuous; endocarp bony, conspicuously verrucose, 1-loculed. Seeds ca. 2 cm. Fl. Jun-Jul, fr. Jul-Sep. 2n = 30.

Forests; 2300-2600 m. NW Yunnan [Bhutan, Cambodia, India, Laos, Malaysia, Myanmar, Nepal, Thailand, Vietnam].

One of us (Chamlong Phengklai) believes that Elaeocarpus lacunosus is synonymous with this species. However, the other of us (Tang Ya) differentiates these on account of E. lacunosus having puberulent branchlets and cuneate or obtuse leaf bases and E. lanceifolius having glabrous branchlets and cuneate, ± decurrent leaf bases.