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Issue: Vol. 74 No. 1 (2012)
Type: Article
Published: 2012-12-05
DOI: 10.11646/phytotaxa.74.1.2
Page range: 30–38
Abstract views: 15
PDF downloaded: 1

Cytological and phylogenetic study of Petrocosmea hexiensis (Gesneriaceae), a new species from Chongqing, China

Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen, 518004, China
Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen, 518004, China College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
Institute of Chongqing Medical Plant Cultivation, Nanchuan, Chongqing 408435, China
Institute of Chongqing Medical Plant Cultivation, Nanchuan, Chongqing 408435, China
China Eudicots

Abstract

A new species, Petrocosmea hexiensis, is described and illustrated from Hexi in the Nanchuan district of Chongqing, China. The new species is similar to Petrocosmea duclouxii, but differs mainly in having a longer corolla tube and ovate-rhombic to rhombic leaves with truncated bases. Cytological and phylogenetic studies of the new species demonstrate that it has the same chromosome number as other species of Petrocosmea and that its closest relative is P. duclouxii.