Memecylon nigrescens Hook. & Arn.

Shrubs or trees, 2-8 m tall, many-branched. Branches terete, glabrous; bark canescent brown. Petiole 2-3 mm; leaf blade brownish yellow-green when dry, elliptic, rarely ovate-oblong, 3-6.5 × 1.5-3 cm, stiffly papery, both surfaces glabrous and glossy, base cuneate, margin entire, apex obtuse to acute and sometimes with a retuse tip. Inflorescences axillary, cymose, nearly capitate, less than 1 cm, 2- or 3-branched, many-flowered; peduncle very short; bracts very small, caducous. Pedicel ca. 0.5 mm. Hypanthium shallowly cup-shaped, ca. 1.5 × 2 mm, glabrous, apex truncate and shallowly 4-lobed. Petals blue or white, broadly lanceolate, ca. 2 × 1 mm, base unguiculate, margin irregularly 1- or 2-dentate, apex acuminate. Stamens ca. 2 mm; filaments 1.2-1.5 mm; anthers and conic connective ca. 0.8 mm, lacking abaxial gland. Fruit black when dry, a baccate drupe, globular, 6-7 mm in diam. Fl. May-Jun, fr. Dec-Feb.

Guangdong, Hainan.

● Sparse to dense forests, thickets, hillsides; 400-1700 m.

Memecylon nigrescens là một loài thực vật có hoa trong họ Mua. Loài này được Hook. & Arn. mô tả khoa học đầu tiên năm 1833.

黑叶谷木（学名：Memecylon nigrescens）为野牡丹科谷木属下的一个种。