Morinda angustifolia Roxb., Pl. Coromandel 3: 32 (1815)
Name meaning 'narrow leaved'.
Morinda angustifolia var. scabridula Craib
Morinda squarrosa Buch.-Ham.
Erect shrubs or small trees, ca. 6 m tall; branches quadrangular, glabrous. Leaves opposite, or solitary opposite an inflorescence;
petiole 0.5-1 cm, glabrous; blade drying papery, matte on both surfaces, brownish green, elliptic-oblong, elliptic, oblong-lanceolate,
or oblanceolate, 15-30 x 6-10 cm, adaxially glabrous, abaxially scabrous to glabrous or sometimes sparsely hirtellous on veins, base
acute to attenuate, apex acute to acuminate; secondary veins 9-13 pairs; stipules interpetiolar, free or shortly united to petioles,
triangular, 4.5-5 mm, acuminate or acute. Inflorescence solitary and leaf-opposed; peduncle 1.5-4 cm; flowering head 1, subglobose to
cylindrical, many flowered, 0.8-2.5 cm (not including corollas); bracteoles subulate. Flowers fused only shortly at base, distylous.
Calyx glabrous; limb truncate to denticulate, ca. 1 mm. Corolla white, salverform, outside glabrous; tube cylindrical to slenderly
funnelform, 16-33 mm; lobes 5, ovate-lanceolate, 4-15 mm, acute. Ovary 4-celled. Drupecetum mulberry-shaped, subglobose, or ellipsoid-
oblong, to 2.5 cm in diam. Drupes partially fused to nearly separate, white or black, obovoid to subglobose, 10-15 mm.
Forests; 500-1400 m.
India, southern Himalaya, Burma, Southern Yunnan, Thailand, Laos.
China: Huang mu ba ji.