Genus Nianhochloa H.N.Nguyen & V.T.Tran
Type species. — Nianhochloa bidoupensis H.N.Nguyen & V.T.Tran, sp. nov.
Etymology. — This genus is named in honor of Prof. Nianhe Xia, in recognition of his contributions to the understanding of the bamboos of Vietnam. The second author was his student, and received from Prof. Xia direction and encouragement in the study of bamboos.
Nianhochloa bidoupensis H.N.Nguyen & V.T.Tran
Typus
Vietnam. Lam Dong Province, Bidoup Mountain, Hon Giao Peak, elevation 1650 m a.s.l., 108°42’54.7”E, 12°11’12.8”N, VI.2006, H.N. Nguyen, V.T. Tran 62006601 (holo-, FSIV! [Herbarium of Forest Science Institute of Vietnam]).
Other material examined
Vietnam. Annam, Nha Trang, 1800 m a.l.s., 26.V.1922, Poilane 3688 (P!).
Distribution, habitat and proposed conservation status
The species Nianhochloa bidoupensis sp. nov. is endemic to Bidoup Mountain, in the southern highlands of Vietnam and is assessed as Critically Endangered because its EOO (extent of occupancy) is less than 100 km2. Otherwise, it grows sparsely scattered on Hon Giao peak, Bidoup Mountain, and is not known from any other locality. Therefore, the species should be regarded as Critically Endangered (CR) according to the World Conservation Union (IUCN) threat categories (IUCN 2001). Associated species at the type locality include: Fokienia hodginsii Henry & Thomas (Cupressaceae), Podocarpus imbricatus Blume, Podocarpus neriifolius D.Don (Podocarpaceae), Quercus macrocalyx Hick. & Cam., Quercus langbianensis Hick. & Cam. (Fagaceae) and Camellia sp. (Theaceae).
Phenology
Its flowering period extends from June to August (as seen during 2006-2010). New shoots are developed between June and August.
Etymology
The specific epithet refers to the type locality, Bidoup Mountain, Lac Duong District, Lam Dong Province, Vietnam.
Hoang Nghia Nguyen
Van Tien Tran