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Issue: Vol. 277 No. 1: 23 September 2016
Type: Article
Published: 2016-09-23
DOI: 10.11646/phytotaxa.277.1.5
Page range: 59–67
Abstract views: 29
PDF downloaded: 1

Morphological, genome-size and molecular analyses of Apostasia fogangica (Apostasioideae, Orchidaceae), a new species from China

Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Centre of China and The Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China
The Nanxiong Forestry Bureau, Nanxiong 512400, China
Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Centre of China and The Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China College of Arts, College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Centre of China and The Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China
College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510640, China
College of Arts, College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Centre of China and The Orchid Conservation and Research Centre of Shenzhen, Shenzhen 518114, China College of Arts, College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510640, China
Asian orchids flow cytometry Neuwiedia nuclear C-value orchid phylogenetics Monocots China

Abstract

After examining morphological, molecular and genome-size evidence, we describe and illustrate a new orchid species, Apostasia fogangica, from Guangdong, China. Morphological comparisons indicate that A. fogangica is similar to A. shenzhenica, although the habit, leaves, inflorescences and fruit shapes and sizes differ. Comparison of the genome sizes in Apostasioideae show that A. fogangica is 1C=0.952 pg, which is double the size of A. shenzhenica but close to that of A. wallichii. Molecular analyses from combined nuclear and plastid datasets (ITS, matK and trnL-F) indicate that A. fogangica is sister to A. nipponica plus A. shenzhenica. The morphological, genome-size and molecular evidence support the hypothesis that A. fogangica is a new species.