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Issue: Vol. 655 No. 2: 25 Jun. 2024
Type: Article
Published: 2024-06-25
DOI: 10.11646/phytotaxa.655.2.8
Page range: 209-218
Abstract views: 151
PDF downloaded: 10

Dendrobium tetrapterum, a cryptic species in the D. lindleyi alliance (Orchidaceae; Dendrobiinae): evidence from morphological and molecular data

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
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
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 571101, Hainan, 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. Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Asian orchids Dendrobium phylogenetics Malaxideae Section Callista Monocots

Abstract

Dendrobium tetrapterum, a cryptic species in the D. lindleyi alliance, is described and illustrated. Detailed morphological comparisons indicate that it is similar to D. lindleyi and D. jenkinsii but can be distinguished by four morphological characters, namely petals without (vs. with) claw, slit (vs. entire) transverse septum at lip base, anther cap with (vs. without) indentation on each side and a rhombic (vs. pentagonal–octagonal or oblong) pseudobulb cross-section. Combined with the geographical distribution and whole plastid genome data, we confirm that D. tetrapterum is not a natural hybrid of the other two species, but a separate species.

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