Foonchewia guangdongensis gen. et sp. nov. (Rubioideae: Rubiaceae) and its systematic position inferred from chloroplast sequences and morphology |
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Authors: | Hai‐Zhen WEN Rui‐Jiang WANG |
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Institution: | 1.(South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China)
;2.(Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract: | Abstract The new species, Foonchewia guangdongensis R. J. Wang & H. Z. Wen and the new monotypic genus Foonchewia R. J. Wang (Rubioideae, Rubiaceae), are described from eastern Guangdong, China. It is characterized by its subshrub habit, pentamerous and heterostylous flowers, 2‐1ocular ovary with many ovules, and apically dehiscent capsules with numerous angulated seeds. Phylogenetic analysis of four chloroplast DNA regions (rbcL, rps16, ndhF, and atpB‐rbcL) revealed that the new genus is nested in the Spermacoceae alliance and is sister to Dunnia. Morphological comparison between these two genera indicated that they had few synapomorphies; it was therefore inappropriate to classify the new genus in the existing tribe Dunnieae, and a new tribe, Foonchewieae R. J. Wang, is accordingly proposed. |
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Keywords: | Foonchewia Foonchewia guangdongensis Foonchewieae new genus new species Rubiaceae |
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