23. Zanthoxylum avicennae (Lamarck) Candolle, Prodr. 1: 726. 1824.
Fagara avicennae Lamarck, Encycl. 2: 445. 1788; Zanthoxylum avicennae var. tonkinense Pierre; Z. avicennae var. touranense Pierre; Z. lentiscifolium Champion ex Bentham.
Trees to 15 m tall, deciduous. Branchlets and leaves glabrous, with prickles. Leaves 11-21-foliolate; rachis winged; leaflet blades opposite or rarely subopposite, obliquely ovate, rhomboidal, obovate, or falcate, 2.5-7 × 1-3 cm, oil glands visible on fresh leaves or inconspicuous, margin entire or apically crenate, apex mucronate to blunt. Inflorescences terminal, many flowered; rachis purplish red. Flowers 5-merous. Pedicel purplish red. Perianth in 2 series. Sepals green, broadly ovate. Petals yellowish white, ca. 2.5 mm. Male flowers: stamens 5; rudimentary gynoecium disciform, 2-lobed. Female flowers: carpels 2(or 3); staminodes small. Fruit pedicel 3-6 mm; follicles pale purplish red, 4-5 mm in diam., oil glands numerous, large, and slightly protruding, apex not beaked. Seeds 3.5-4.5 mm in diam. Fl. Jun-Aug, fr. Oct-Dec.
Secondary forests in lowland flat areas, hillsides, valleys; 400-700 m. S Fujian, Guangdong, Guangxi, Hainan, S Yunnan [India, Indonesia, Malaysia, Philippines, Thailand, Vietnam].