Zanthoxylum collinsiae Craib

Hartley (J. Arnold Arbor. 47: 181. 1966) placed Zanthoxylum collinsiae, Z. asperum, and Z. scabrum in the synonymy of Z. nitidum.

Woody climbers. Branchlets with prickles. Younger branchlets, leaf rachises, petiolules, and abaxial surface of leaflet blades villous. Leaves 5-9-foliolate; petiolules 2-4 mm; leaflet blades opposite, broadly ovate to ovate-elliptic, 7-19 × 5-8 cm, papery, black to blackish brown when dry, slightly lustrous, adaxially hirsutulous, midvein with prickles, secondary veins 8-12 on each side of midvein, base oblique and rounded to subcordate, margin entire to crenate, apex mucronate, caudate, or rarely acuminate and with a retuse tip and an oil gland. Inflorescences axillary, 3-5 cm. Flowers 4-merous. Pedicel puberulent. Perianth in 2 series. Sepals puberulent, ca. 1 mm. Petals ca. 3 mm. Male flowers: stamens 4; rudimentary gynoecium ca. 1.5 mm. Fruit pedicel 2-4 mm; follicles ca. 6 mm in diam., pubescent, oil glands impressed when dry. Seeds 4.5-5 mm in diam. Fl. Apr-May, fr. Sep-Oct.

NW Guangxi, SW Guizhou, S Yunnan [Laos, NE Thailand, N Vietnam].

Hillside open forests and thickets; 500-1000 m.

Zanthoxylum asperum C. C. Huang; Z. scabrum Guillaumin.

Zanthoxylum collinsiae is a woody plant in the family Rutaceae, its native range is Yunnan, Guizhou, and Guangxi in China to Indo-China.