5. Benkara rectispina (Merrill) Ridsdale, Reinwardtia. 12: 299. 2008.
直刺簕茜 zhi ci le qian
Randia rectispina Merrill, Lingnan Sci. J. 14: 60. 1935; Oxyceros rectispinus (Merrill) T. Yamazaki.
Shrubs, 2-4 m tall, sometimes scandent; branches weakly compressed to subterete, glabrous, rather stout, often yellowish white, with thorns 6-14 mm. Petiole 3-6 mm, glabrous; leaf blade drying leathery and usually straw- to brownish yellow, ovate, elliptic-ovate, or elliptic, 1.5-6.5 × 1-3 cm, both surfaces glabrous and rather shiny, base cuneate, obtuse, or subrounded, apex obtuse or slightly rounded or rarely acute; secondary veins 4-6 pairs, in abaxial axils usually with foveolate and/or pilosulous domatia; stipules lanceolate to triangular, ca. 2 mm, acute to caudate or aristate. Inflorescences 1- or less often 2-flowered, glabrescent; peduncles 2-8 mm; bracteoles absent or 2, broadly ovate-triangular, 1.5-2 mm, acute, after falling leaving a persistent pilose ring; pedicels 5-8 mm. Calyx limb glabrous; ovary portion subglobose, ca. 2 mm; limb campanulate, ca. 4.5 × 3 mm, shallowly lobed; lobes triangular, 0.5-1.2 mm, cuspidate. Corolla white, outside glabrous; tube 18-22 mm; lobes elliptic-ovate, 5-6 mm, obtuse. Fruiting pedicels 5-12 mm. Berry globose, 6-10 mm in diam., glabrous; seeds 3-4 mm. Fl. Apr-Jul, fr. Sep-Jan.
● Forests or thickets at seasides or on hills; near sea level to 300 m. Hainan.