13. Berberis muliensis Ahrendt, Bull. Misc. Inform. Kew. 1939: 268. 1939.
木里小檗 mu li xiao bo
Shrubs, deciduous, to 2 m tall. Branches gray-brown, sulcate, not pruinose; shoots shiny, red; internodes 2-5 cm; spines 3-fid, yellow-brown, 1.5-3 cm, slender, sometimes absent. Petiole 2-3 mm; leaf blade abaxially sometimes grayish green, adaxially dark green, narrowly obovate or oblong-obovate, 1.5-3 × 0.3-1.1 cm, papery, abaxially pruinose, midvein raised, adaxially with slightly impressed midvein, both surfaces with conspicuous lateral and reticulate veins, base cuneate, margin applanate-entire or spinose-serrate, apex rounded or acute. Flowers solitary. Pedicels 1-3 cm, not pruinose; bractlets yellow, broadly obovate, ca. 2.5 × 2.5 mm. Sepals in 2 whorls; outer sepals ovate, 7-8 × 4-5 mm, apex acute; inner sepals obovate, 9-10 × 6-7 mm. Petals obovate, ca. 6.5 × 5.5 mm, base with narrowly elliptic glands, apex shortly emarginate. Stamens ca. 5 mm; anther connective prolonged, apiculate. Ovules 3 or 4. Berry red, ovoid or oblong-ovoid, 10-14 × 6-9 mm, not pruinose, style not persistent. Fl. May-Jun, fr. Aug-Sep.
● Thickets, forests, river beaches by forest margins, grassy slopes, rocky slopes; 2800-4300 m. Sichuan, Xizang, Yunnan.