Planchonella clemensii (Lecomte) P. Royen

Trees 5--20 m tall. Bark dark brown. Branchlets gray sericeous, glabrescent. Leaves often closely clustered at end of branchlets; petiole ca. 1 cm; leaf blade narrowly oblanceolate to elliptic-lanceolate, 7--16 X 0.8--2.5 cm, leathery, both surfaces glabrous, base cuneate, margin usually recurved, apex acute to obtuse, lateral veins 10--16 pairs. Flowers several in axillary clusters. Pedicels angulate, 5--10 mm. Sepals 2.5--3.5 mm, both surfaces glabrous. Corolla white, lobes 5, subrounded, 2--2.5 X ca. 1.5 mm. Staminodes lanceolate, 1--1.5 mm. Ovary ovoid, 1 X 2 mm, scattered rust colored tomentose, 5-locular; disc irregularly lobed. Style ca. 2 mm, 5-ribbed. Fruit oblique obovoid to ovoid, 8--10 X 6--7 mm, with remnant of style and persistent calyx; pericarp membranous, black when ripe; 1--3 seeded. Seeds oblique fusiform, 6--9 X 3--4 mm; scar narrow, a little shorter than seed, brownish. Fl. Feb-May, fr. Oct.

Hainan [Vietnam].

Beside streams; 400--500 m.

Sideroxylon clemensii Lecomte, Fl. Indo-Chine 3: 890. 1930.

Planchonella clemensii là một loài thực vật có hoa trong họ Hồng xiêm. Loài này được (Lecomte) P.Royen miêu tả khoa học đầu tiên năm 1957.

狭叶山榄（学名：Planchonella clemensii）为山榄科山榄属下的一个种。