Tuesday, January 31, 2012

[Botany • 2010] Lecanorchis javanica & L. nigricans • New records in Lecanorchis (Orchidaceae) Blume from Thailand, with keys to the Thai species

 Three orchid species, Lecanorchis javanica Blume, L. nigricans Honda and Vanilla griffithii Rchb.f., are newly recorded for Thailand. The species are described and illustrated. Keys to the Thai species of Lecanorchis and Vanilla are also provided.

Key words: Lecanorchis, Vanilla, Orchidaceae, new record, Thailand.

Lecanorchis Blume and Vanilla Plum. ex Mill. belong to the tribe Vanilleae, subfamily Vanilloideae (Orchidaceae). Most genera of Vanilloideae are distributed worldwide. Vanilla  is pantropical, with its greatest diversity in Brazil. The most important species for the production of  vanilla is V. planifolia, a species indigenous to central America (Pridgeon et al., 2003).

Figure 3. C. & D. Lecanorchis nigricans Honda, photographed by Petch Tripetch

Lecanorchis nigricans Honda

Distribution.— Japan (type), Taiwan, S China.
Thailand:- Chanthaburi, Nakhon Nayok

Ecology.— In tropical evergreen forest and lower montane forest; 400–1000 m altitude; Flowering: May–July.

Figure 3. A. & B. Lecanorchis javanica Blume, photographed by Sahut Chantanaorrapint

Lecanorchis javanica Blume

Distribution.— Vietnam, Peninsular Malaysia, The Philippines, New Guinea (O’Byrne & Vermeulen, 2002) and Java (type).
Thailand:- Chanthaburi, Nakhon Si Thammarat, Yala (Batong)

Ecology.— In lower montane forest; 1000–1500 m altitude; Flowering: March–May

Suddee, S., S. Chantanaorrapint, P. Tripetch and S. Thainukul 2010. New records in Lecanorchis Blume and Vanilla Plum. ex Mill. from Thailand, with keys to the Thai species. Thai Forest Bull. (Bot.) 38: 1-7. http://web3.dnp.go.th/botany/PDF/TFB/TFB38/01_Lecanorchis.pdf