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

4. Aidia oxyodonta (Drake) T. Yamazaki, J. Jap. Bot. 45: 339. 1970.

尖萼茜树 jian e qian shu

Randia oxyodonta Drake, J. Bot. (Morot) 9: 218. 1895.

Shrubs or trees, 2-12 m tall; branches somewhat flattened to subterete, puberulent to glabrous. Petiole 8-13 mm, glabrous; leaf blade drying leathery and often pale yellow adaxially and reddish brown abaxially, elliptic-oblong, lanceolate, or elliptic, 8-19 × 2.3-7.5 cm, glabrous on both surfaces, base obtuse to acute, apex acuminate or acute; secondary veins 7-10 pairs, in abaxial axils often with foveolate and/or pilosulous domatia; stipules generally persistent, ovate to narrowly triangular, 5-15 mm, glabrous, apex long acuminate to aristate. Inflorescences cymose with axes dichasial or often becoming monochasial distally, 4-5 cm, glabrous; peduncle 0.8-1 cm; bracts ovate to subulate, 2-3 mm, acute to acuminate; pedicels 2-5 mm. Calyx glabrous; ovary portion obconic, ca. 1.5 mm; limb with tubular portion campanulate, 5-5.5 mm; lobes 5, subulate or linear-lanceolate, 2-4.5 mm, ciliate to glabrous. Corolla yellowish white, outside glabrous; tube 4-5 mm; lobes oblong-spatulate, 9-10 × 3-5 mm, acuminate. Berry 7-13 mm in diam., glabrous; seeds flattened, ca. 2.5 mm. Fl. Apr-Nov, fr. May-Oct.

Thickets or forests on hills or mountains; 100-1000 m. SW Guangdong, SE Guangxi, Hainan [Vietnam].

The Vietnam checklist (Checkl. Pl. Spec. Vietnam 3: 85. 2005) recognized Aidia oxyodonta var. microdonta (Pitard) P. H. Hô (Ill. Fl. Vietnam 3: 189. 1993), which is based on Randia oxyodonta var. microdonta Pitard; presumably if this variety is recognized the Chinese plants fall under A. oxyodonta var. oxyodonta, but so far Chinese literature has not mentioned these varieties.


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