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| Pilea danxiaensis L.F.Fu, A.K.Monro & Y.G.Wei, in Fu, Xiong, Monro, ... et Liao, 2022. |
Abstract
Pilea danxiaensis L.F.Fu, A.K.Monro & Y.G.Wei, a new species of Urticaceae from Danxia landform, Guangdong, China, is described and photographed. Phylogenetic analyses based on three DNA regions (ITS, trnL-F and rbcL) suggest that the new species belongs to P. sect. Pilea. Within the section, the new species is morphologically most similar to P. sinocrassifolia and P. peploides. Plastid genome and ribosomal DNA (rDNA) sequences of the new species are assembled and annotated. The plastid genome is 151,857 bp in length and comprises two inverted repeats (IRs) of 25,307 bp separated by a large single-copy of 82,836 bp and a small single-copy of 18,407 bp. A total of 113 functional genes are recovered, comprising 79 protein-coding genes, 30 tRNA genes, and four rRNA genes. A global conservation assessment suggests that P. danxiaensis should be classified as of Least Concern (LC).
Keywords: Danxia landscape, new taxon, plastome, taxonomy
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| Pilea danxiaensis L.F.Fu, A.K.Monro & Y.G.Wei, sp. nov. A habitat B habit C leaves and inflorescence D stipules E staminate inflorescence F pistillate inflorescence G staminate flower H pistillate flower I achene with pistillate sepals J LM of achene K SEM of achene. |
Pilea danxiaensis L.F.Fu, A.K.Monro & Y.G.Wei, sp. nov.
Diagnosis: Most similar to Pilea sinocrassifolia C.J.Chen from which it can be distinguished by the longer stipule (1.3–1.5 mm versus 1 mm), petiole (2–8 mm versus 0.2–0.6 mm) and staminate peduncle (8–25 mm versus 1.5–7 mm).
Distribution and habitat: Pilea danxiaensis L.F.Fu, A.K.Monro & Y.G.Wei is known from a single locality in Renhua County, Shaoguan City, Guangdong, China, where it grows in a ravine on the Danxia landform, a petrographic geomorphology formed from Cretaceous sandstones and conglomerates.
Etymology: The species epithet is named after the Danxia landform with which the species is associated.
Vernacular name: dān xiá lěng shuǐ huā (Chinese pronunciation); 丹霞冷水花 (Chinese name).
Long-Fei Fu, Chi Xiong, Alexandre K. Monro, Qiang Fan, Zai-Xiong Chen, Fang Wen, Zi-Bing Xin, Yi-Gang Wei and Wen-Bo Liao. 2022. Pilea danxiaensis (Urticaceae), A New Species in the Danxia Landform from Guangdong, China including A Description of the Entire Chloroplast Genome. PhytoKeys. 204: 109-119. DOI: 10.3897/phytokeys.204.86857
