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FOC | Family List | FOC Vol. 19 | Rubiaceae | Tarenna

12. Tarenna polysperma Chun & F. C. How ex W. C. Chen, Acta Phytotax. Sin. 22: 144. 1984.

多籽乌口树 duo zi wu kou shu

Shrubs or trees, 1.5-14 m tall; branches slightly compressed, glabrous, becoming brown when old. Petiole 5-15 mm, glabrous; leaf blade drying leathery and olive-greenish brown, oblong-lanceolate or elliptic, 5-10.5 × 1.5-3.8 cm, glabrous on both surfaces, base cuneate, apex shortly acuminate or abruptly acute; secondary veins 7-9 pairs, without domatia; stipules deciduous usually through fragmentation often leaving a persistent truncate base, interpetiolar, triangular to narrowly triangular, 3-4 mm, glabrous, acute. Inflorescences corymbose and trichotomous, 3-5 × 4-6 cm, 6-10-flowered, puberulent to glabrescent, subsessile to pedunculate; peduncle to 1 cm; bracts filiform, 1-2 mm, ciliolate; pedicel 3.5-6.5 mm. Flowers pedicellate. Calyx glabrous; hypanthium portion turbinate, ca. 1 mm; limb 1-1.5 mm, lobed for ca. 1/2; lobes broadly triangular. Corolla white, glabrous outside; tube ca. 8 mm, villous at throat; lobes ovate to elliptic, ca. 4.5 mm, obtuse. Ovules ca. 17 per cell. Berry globose, ca. 7 mm in diam., glabrous; seeds 14-27. Fl. Mar-Apr, fr. May-Oct.

● Forests on mountains; 900-1000 m. Guangdong.

The protologue and W. C. Chen in FRPS (71(1): 382. 1999) described the secondary leaf veins as 7-9 pairs, but the paratypes seen all have 5 or 6 pairs, which has complicated herbarium identifications of this species.


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