石山花椒 shi shan hua jiao

Shrubs or woody climbers, 2-3 m tall. Branchlets and leaf rachises with prickles. Branchlets lenticellate, puberulent. Leaves 9-31-foliolate; petiolules, leaf rachises adaxially, and leaflet blades adaxially on midvein puberulent to pubescent; petiolules 1-3 mm; leaflet blades lanceolate, obliquely oblong, or rarely ovate, 2-5 × 0.7-2.5 cm, oil glands inconspicuous, midvein adaxially plane or basally impressed, secondary veins 9-12 on each side of midvein, base oblique and subrounded to broadly cuneate, margin subapically crenulate, apex acute or shortly acuminate, glandular retuse at tip. Inflorescences axillary. Flowers 4(or 5)-merous. Perianth in 2 series. Sepals 0.5-1 mm. Petals 2-3 mm. Infructescences paniculate, 3-6 cm. Fruit pedicel ca. 5 mm; follicles 5-6 mm, oil glands impressed when dry. Seeds 3.5-4.5 mm in diam. Fl. Mar-Apr, fr. Sep-Nov.

● Upland open forests; 500-1600 m. W Guangxi, SW Guizhou, SE Yunnan.