峨眉十大功劳 e mei shi da gong lao

Berberis pachakshirensis (Ahrendt) Laferrière; B. polyodonta (Fedde) Laferrière; B. veitchiorum Hemsley & E. H. Wilson; Mahonia pachakshirensis Ahrendt; M. veitchiorum (Hemsley & E. H. Wilson) C. K. Schneider.

Shrubs, 0.5-2 m tall. Leaves abaxially pale yellowish green, adaxially dull green, slightly shiny, oblong, 15-30 × 5-10 cm, with 4-8 pairs of leaflets, lowest pair 0.5-2.5(-4) cm above base of petiole, abaxially venation reticulate and raised, adaxially venation distinct, veins and veinlets sometimes impressed; rachis 2-2.5 mm in diam.; internodes (1.5-)3-6 cm, decreasing (rarely increasing) in length upward; leaflets sessile, lowest pair obovate-oblong, 2.5-6 × 1.2-2.3 cm, those above elliptic to ovate-oblong, 4-9 × 2-3 cm, base broadly cuneate to rounded, oblique, margin with 10-16 spinose teeth on each side, apex acuminate; terminal leaflet 8-12 × 2.4-3.7 cm, petiolule ca. 2 cm. Inflorescence 3-5-fascicled racemes, 5-6 cm; bracts of inflorescence ovate-lanceolate, ca. 2 × 1 cm. Pedicel 2-3(-6) mm; floral bracts broadly lanceolate, 6-11 × 3-5 mm. Flowers bright to sulfur-yellow. Outer sepals ovate, 3-4 × 2-2.5 mm; median sepals oblong-elliptic, 4-4.5 × 2-2.6 mm; inner sepals oblong, ca. 5 × 2.6-3 mm. Petals oblong, 3.5-4.2 × 2-2.1 mm, base with distinct glands, apex acutely emarginate, lobes rounded. Stamens ca. 3 mm; anther connective not prolonged, truncate. Ovary 2.7-3 mm; ovules 2. Berry bluish black, slightly pruinose, obovoid, 5-5.6 × 3-4 mm; style persistent, short, 0.5-1 mm. Fl. Mar-May, fr. May-Aug.

Forests, scrubby slopes, bamboo thickets, roadsides, rocky areas; (1300-)1800-3100 m. NE Guizhou, W Hubei, Sichuan, Xizang, Yunnan [India (Assam), Myanmar].