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Epitypification, emendation and synonymy of Lecanorchis taiwaniana (Vanilleae, Vanilloideae, Orchidaceae)



The genus Lecanorchis Blume (1856: 188) comprises a group of mycoheterotrophic species that grow in multiple clusters with an erect, branched or unbranched stem (Hashimoto 1990, Sawa et al. 2006, Seidenfaden 1978, Szlachetko & Mytnik 2000). The key characteristic of the species of Lecanorchis is the presence of a calyculus, a cup-like structure between the base of the perianth and the apex of the ovary (Cameron 2003, Hashimoto 1990, Sawa et al. 2006). There are about thirty species and/or varieties in the genus Lecanorchis extending across a large geographical area that includes Thailand, Malaysia, Indonesia, Vietnam, the Philippines, Taiwan, Japan, and New Guinea (Hashimoto 1990, Seidenfaden 1978, Su 2000, Szlachetko & Mytnik 2000, Cameron 2003, Averyanov 2011). Precise identification of the Lecanorchis species is often difficult due to close similarities in morphology and the short durations of flowering periods (Hashimoto 1990, Averyanov 2005, Suddee & Pedersen 2011, Tsukaya & Okada 2013). Furthermore, detailed descriptions are lacking for some species, particularly those described in decades past. Given such difficulties in precise identification, adequate taxonomic studies of this genus have not been conducted.


Lecanorchis taiwaniana, Vanilleae, Vanilloideae, Orchidaceae, Monocots

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