2. Tarenna attenuata (J. D. Hooker) Hutchinson in Sargent, Pl. Wilson. 3: 411. 1916.
假桂乌口树 jia gui wu kou shu
Webera attenuata J. D. Hooker, Fl. Brit. India 3: 104. 1880; Ixora attenuata (J. D. Hooker) Kuntze; Tarenna sylvestris Hutchinson.
Shrubs or trees, 1-8 m tall; branches glabrous, flattened, becoming ash gray to brown with age. Petiole 0.5-1.5 cm, glabrous; leaf blade drying papery or thinly leathery, blackish brown, and somewhat shiny adaxially, oblong-lanceolate, oblong-obovate, lanceolate, or obovate, 4.5-15 × 1.5-6 cm, both surfaces glabrous, base cuneate or acute, margins sometimes thinly revolute, apex acuminate or abruptly shortly acuminate; secondary veins 5-10 pairs, sometimes with pilosulous domatia; stipules persistent, shortly united around stem, narrowly triangular, 4-9 mm, glabrous, acuminate to cuspidate. Inflorescences congested-cymose, pyramidal to corymbiform, 2.5-5 × 4-6 cm, many flowered, puberulent to glabrescent, pedunculate; peduncle 0.3-1 cm; bracts narrowly triangular to subulate, 1-5 mm, acute; pedicels 0.5-5 mm. Flowers subsessile to pedicellate in dichotomous cymules. Calyx glabrous; hypanthium portion subglobose to ellipsoid, 1.5-2 mm; limb 1-2 mm, lobed for 1/4-1/2; lobes triangular, acute. Corolla white or pale yellow, outside glabrous; tube 2-2.5 mm, villosulous at throat; lobes narrowly oblong to spatulate, 5-8 mm, acute to obtuse. Ovules 1 per cell. Berries subglobose, 5-7 mm in diam., glabrous; seeds 2. Fl. Apr-Nov, fr. May-Jan.
Forests or thickets at streamsides, on hills or mountains, or in fields; near sea level to 1200 m. Guangdong, Guangxi, Hainan, Yunnan [Cambodia, India, Thailand, Vietnam].