Accepted name: Mahonia oiwakensis
Erect, branched shrub. Leaves with more than 8 pairs of leaflets. Leaflets 1-2 cm wide, relatively narrow. Flowers in erect spikes 10-30 cm long; winter.
W China, Burma
M. nepaulensis DC. from the Himalaya is similar to M. lomariifolia Takeda but with leaflets much wider, 3-4.5 cm wide.
Source: (1997). Berberidaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.