Abstract
Saxifraga damingshanensis (Saxifragaceae), a new species from Damingshan Nature Reserve in Guangxi Province, is described and illustrated. A morphological comparison between the new species and its putative relatives, S. mengtzeana and S. luoxiaoensis, is presented. The new species is morphologically similar to S. mengtzeana, but it can be easily distinguished by its non-peltate leaf, both surfaces of mature leaf blade covered with white glandular trichome, petals 3-veined and margin entire. Phylogenetic analysis, based on two chloroplast DNA regions (matK and psbA-trnH), confirmed that the new species belongs to S. sect. Irregulares. The new species is currently only known from Damingshan, Guangxi and we assign it an IUCN Red List preliminary status as Data Deficient.
Highlights
Saxifraga L. (Saxifragaceae) is widely distributed throughout the Northern Hemisphere and comprises ca. 440–450 species (Pan et al 2001; Tkach et al 2015a, b)
The new species differs from S. mengtzeana by having leaf base cordate to deep cordate, leaves papery or nearly leathery, adaxial surface of the mature leaf with glandular trichome and longest petal 3-veined, margin entire
Based on its basal leaves with long petiolate, flower zygomorphic and stamens with club-shaped filaments, the new species could be placed within S. sect
Summary
Saxifraga L. (Saxifragaceae) is widely distributed throughout the Northern Hemisphere and comprises ca. 440–450 species (Pan et al 2001; Tkach et al 2015a, b). (Saxifragaceae) is widely distributed throughout the Northern Hemisphere and comprises ca. 440–450 species (Pan et al 2001; Tkach et al 2015a, b). Numerous previous molecular phylogenetic studies suggested that Saxifraga is monophyletic, providing that S. sect. (Soltis et al 1996; Prieto et al 2013; Deng et al 2015; Tkach et al 2015a, b). Wan-Yi Zhao et al / PhytoKeys 133: 95–103 (2019)
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