Characters;"O. wumengensis";"O. panzhouensis" Petiole;"oblate, brown pubescent";"round, brown villous" "Leaf blade";"oblong, long elliptic to oblanceolate";"ovate to suborbicular" Peduncle;"brown pubescent";"brown villous" Bract;"lanceolate to elliptic";"linear to subulate" Pedicel;"glandular pubescent";"brown villous" Calyx;"5-lobed to the base, lobes linear or narrowly triangular";"5-lobed to the middle, lobes broadly triangular" Corolla;"sigmoid, yellow, slightly contracted at the throat, outside sparsely brown pubescent and densely glandular pubescent";"pale yellow, tube campanulate, outside pubescent and glandular-pubescent" Filament;"linear, glandular pubescent";"flattened, glabrous" Anthers;"horseshoe shaped, coherent apically";"broadly oblong, separated" Style;"glandular pubescent";glabrous