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Issue: Vol. 195 No. 1: 22 January 2015
Type: Article
Published: 2015-01-22
DOI: 10.11646/phytotaxa.195.1.4
Page range: 65–72
Abstract views: 22
PDF downloaded: 1

Petrocodon hunanensis (Gesneriaceae), a new species identified by both morphological and molecular evidence from limestone area in Hunan, China

The Dendrological Teaching and Research Team, School of Forestry, Central South University of Forestry & Technology, CN-410004, No. 498, Shaoshan South road, Changsha city, Hunan province, China.
The Dendrological Teaching and Research Team, School of Forestry, Central South University of Forestry & Technology, CN-410004, No. 498, Shaoshan South road, Changsha city, Hunan province, China.
The Dendrological Teaching and Research Team, School of Forestry, Central South University of Forestry & Technology, CN-410004, No. 498, Shaoshan South road, Changsha city, Hunan province, China.
State key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan Road, Nanxincun 20, Beijing 100093, China.
Calcareoboea Didymocarpus Dolicholoma Lagarosolen limestone flora molecular evidence new species Paralagarosolen Petrocodon Tengia Wentsaiboea

Abstract

Petrocodon hunanensis, a new species of Gesneriaceae from limestone area in Hunan Province, China, is described and illustrated. The new species is morphologically similar to Petrocodon coriaceifolius, but readily differs from the latter one in the growth form with terrestrial stems and distinct internodes, both surfaces of leaf densely with white pubescence, petiole densely with reddish-purple or white pubescence, zygomorphic corolla white or pale purple and 2–3 cm long, pedicels 0.3–2 (2.8) cm long, 4 stamens and 1 staminodes, ovary and capsule stipitate. Molecular evidences indicate that it is systematically similar to P. hispidus, but the morphologies of two relatives are obviously different.