Sunday, January 12, 2020

[Botany • 2020] Bulbophyllum papuaense • A New Species of Bulbophyllum sect. Oxysepala (Orchidaceae) from West Papua, Indonesia


Bulbophyllum papuaense X.H.Jin

in Lin, Zhou, Hidayat & Jin, 2020.

Abstract
A new species, Bulbophyllum papuaense, was described and illustrated from Indonesia. Bulbophyllum papuaense is similar to Bulbophyllum tortuosum and B. muscohaerens but differs from them by having rhizome and pseudobulbs covered with papillose scales, caudate and ciliate petals, linear and ciliate lip.

Keywords: Bulbophyllum, Indonesia, new species, Orchidaceae

Figure 2. Close-up of flowers of Bulbophyllum papuaense

Figure 3. Color drawing of Bulbophyllum papuaense. A Plants B front view of flower C lateral view of flower.

Bulbophyllum papuaense X.H.Jin, sp. nov.
  
Diagnosis: Bulbophyllum papuaense is close to Bulbophyllum tortuosum and B. muscohaerens but differs from them by having rhizome and pseudobulbs covered with papillose scales, caudate and ciliate petals, linear and ciliate lip which curve at the tip.

Figure 1. Habit of Bulbophyllum papuaense

Ecology: Bulbophyllum papuaense was discovered in broad-leaved, evergreen montane forest in Mokwan, West Papua. Bulbophyllum papuaense is epiphytic on trunks or shrub in humid and shady areas in montane forest. Plants are tiny and grow usually with moss. Our observation indicated that it was in full bloom in August. Bulbophyllum papuaense is only known from the type locality.

Etymology: The name derives from the Papua, where the new species was discovered.

Taxonomic notes: 
Bulbophyllum papuaense belongs to sect. Oxysepala which is often characterized by 1-flowered inflorescence, lateral sepals connate, basal node of pedicel near at same level with the attachment of floral bract (Vermeulen et al. 2015). Bulbophyllum papuaense is a distinctive species in sect. Oxysepala and easily differs from its relatives by its morphological characters, such as the rhizome with warty scales, caudate and ciliate petals, linear lip recurve and with white hairs.


 Dongliang Lin, Kailing Zhou, Arief Hidayat and Xiao-Hua Jin. 2020. Bulbophyllum papuaense (Orchidaceae), A New Species from Indonesia. In: Jin X-H, Xia N-H, Tan Y-H (Eds) Plant Diversity of Southeast Asia-II. PhytoKeys. 138; 125-130. DOI: 10.3897/phytokeys.138.38714