Description from Flora of China
Berberis virescens J. D. Hooker var. ignorata (C. K. Schneider) Ahrendt.
Shrubs, deciduous, 1-3 m tall. Branches gray, terete, sparsely verruculose; shoots shiny, purplish black; spines simple, sometimes 3-fid, 5-15 mm. Petiole 2-3 mm, or leaf subsessile; leaf blade abaxially gray, adaxially dark green, narrowly obovate, 1-3.5 × 0.4-1.5 cm, papery, abaxially slightly pruinose, midvein slightly raised, adaxially with flat or slightly raised midvein, lateral veins 4 or 5 pairs, reticulate veins inconspicuous, base cuneate, margin entire, sometimes 1-5-spinose-serrate on each side, apex rounded or acute. Inflorescence a raceme or subumbellate raceme, 3-9-flowered, 2-3.5 cm, often with few fascicled flowers at base; bracts ca. 1.5 mm. Pedicels 5-10 mm, slender, glabrous; bractlets broadly lanceolate, ca. 3 × 1 mm. Sepals in 3 whorls; outer sepals oblong-ovate, 4-4.5 × 2-2.5 mm; median sepals elliptic, ca. 5 × 2.5 mm, apex obtuse; inner sepals elliptic-obovate, 5.2-6 × 3.7-4 mm. Petals obovate, 4.5-5 × ca. 3 mm, base with separate glands, apex emarginate, lobes rounded. Stamens ca. 4 mm; anther connective prolonged, obtuse. Ovules 3 or 4, ± not funiculate. Berry red, oblong, 10-13 × 5-7 mm, not pruinose, style not persistent. Fl. May, fr. Aug-Sep.
Forests, thickets, mixed forests; 2700-3800 m. Xizang [Bhutan, India (Sikkim)].