Kalimantanorchis: a New Genus of Mycotrophic Orchid from West Kalimantan, Borneo
A new genus and species of mycotrophic orchid (Orchidaceae),
Kalimantanorchis nagamasui
Tsukaya, M. Nakajima et H. Okada, from Betung Kerihun National Park, West Kalimantan, Borneo, Indonesia, is described and illustrated. Kalimantanorchis resembles the genus Tropidia
Lindl. in flower and stem morphology, namely, mycotrophic habit, branching stem, nonresupinate flowers with a saccate cymbiform lip bearing two longitudinal ridges along the margins, broadly triangular rostellum, acute, triangular anther cap, and winged or three-lobed column. It differs, however,
in having a tuberous root system, pure ivory-white flower coloration and four pollinia. BLAST analyses based on DNA sequences of the chloroplast matK pseudogene and ITS of the nuclear ribosomal DNA also suggest that the closest genus is Tropidia Lindl., but the similarity is
low and a molecular phylogenetic analysis did not support it to be a member of Tropidia, confirming the idea that this is an undescribed genus.
Keywords: BORNEO; KALIMANTAN; KALIMANTANORCHIS NAGAMASUI; MYCOTROPHIC ORCHID; NEW GENUS; ORCHIDACEAE
Document Type: Research Article
Publication date: 01 January 2011
- Systematic Botany is the scientific journal of the American Society of Plant Taxonomists and publishes four issues per year.
2011 Impact Factor: 1.517
2011 ISI Journal Citation Reports® Rankings: 87/190 - Plant Sciences
34/45 - Evolutionary Biology - Editorial Board
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