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Article
Published: 2020-01-14

Cleisostoma hainanense, a new species (Orchidaceae: Epidendroideae) from Hainan, China: evidence from morphological and DNA analyses

Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Haikou Hainan 571101, China College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Haikou Hainan 571101, China The Engineering Technology Research Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, Danzhou Hainan, 571737, China
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropic Agricultural Sciences, Haikou Hainan 571101, China The Engineering Technology Research Center of Tropical Ornamental Plant Germplasm Innovation and Utilization, Danzhou Hainan, 571737, China
Chinese orchids Cleisostoma clade Cleisostoma phylogenetics Vandeae Monocots

Abstract

A new species, Cleisostoma hainanense (Orchidaceae: Epidedroideae: Aeridinae) from Hainan, China, is described and illustrated. Detailed morphological comparisons indicate that C. hainanense is similar to C. paniculatum, but differs in tauren-shaped mid-lobe with truncated tip, conical spur with inconspicuous septum and arch-shaped back wall callus. The molecular study based on nuclear ribosomal ITS and four plastid (atpI-atpH, matK, psbA-trnH, rbcL) regions support that the new species is sister to C. paniculatum.