A new species and new record of Bulbophyllum (Orchidaceae) from Vietnam

Abstract

The new species, Bulbophyllum manhdatii (B. sect. Brachyantha) discovered in Da Lat Plateau, Lam Dong Province (southern Vietnam) is described here. This new species is close to B. pumilio but clearly differs in densely crowded pseudobulbs and their shape, shorter inflorescence, lateral sepals forming a narrow acute tube slightly flattened at the base, lip without median keel, and longer stelidia. In addition, a new national record, B. seidenfadenii, from the same section is also reported from the first time from North Vietnam.

Langbiangia, a new genus of Gesneriaceae endemic to Langbiang Plateau, southern Vietnam and a taxonomic endeavor to achieve key targets of the post-2020 global biodiversity framework

“…(Rafflesiaceae) in Vietnam [ 28 ]. Langbiang Plateau is also known as the prime habitats of numerous vascular plant species and in the recent decade, a wide range of vascular plant taxa have also been described and/or recorded, including 16 ferns [ 29 – 32 ], one Schisandraceae [ 33 ], three Lauraceae [ 33 , 34 ], five orchids [ 35 , 36 ], one bamboo [ 37 ], one Zingiberaceae [ 33 ], one legume [ 38 ], one aroid [ 39 ], one Menispermaceae [ 40 ], one Daphniphyllaceae [ 33 ], four stone oaks [ 41 , 42 ], one Euphorbiaceae [ 43 ], two Rosaceae [ 33 ], two begonias [ 44 ], one Clusiaceae [ 45 ], one Rutaceae [ 33 ], seven camellias [ 46 – 50 ], four Nyssaceae [ 33 , 51 ], one ginseng [ 52 ], one Loranthaceae [ 53 ], two hollies [ 33 ], one Icacinaceae [ 33 ], one Symplocaceae [ 33 ], one Rubiaceae [ 54 ], and five gesneriads [ 55 – 58 ]. However, the rich and unique biological diversity of the Langbiang Plateau has continuously been threatened by growing land demands for agriculture ( Fig 1 ) and residency [ 59 ].…”