Yersinochloanianheana sp. nov. from Vietnam is described and illustrated. It is found in southern Vietnam, where it occurs at an elevation of 1400-1500 m in Voi Mountain, Duc Trong District, Lam Dong Province. This new species is distinguished from a similar species, Yersinochloadalatensis, by culm nodes with a thick swollen patella, culm leaf blades erect, auricles conspicuous, margins bearing long hairs, palea dorsal view showing rachilla extension and rudimentary floret at the apex and lodicules purple gradually towards the top. Besides that, the species is distinguished from Yersinochloanghiana by the leaf blades without being swollen at the base, the prophyllate bud 2-keeled, lodicules purple at ½ upper parts and unbifid at the base.
Keywords: Bambusoideae; morphology; new taxon; pseudo-spikelet.
Nong Van Duy, Tran Thai Vinh, Vu Kim Cong, Quach Van Hoi, Dang Thi Tham, Nguyen Thi Thanh Hang, Dinh Van Khiem, Hoang Thanh Truong, Nguyen Hoang Nghia, Nguyen Thi Ai Minh, Tran Van Tien.