Abstract
Pirus Zhaoxuanii It is described as A new species from the province of Guangdong, China, within the genre Pirusspecifically below P. Subg. Pashia. Although it shares morphological similarities with P. Calleryana, P. Zhaoxuanii It can be distinguished by its unique, obovate and coastal leaves, which have an obtuse apex and short petioles. A phylogenetic analysis based on single nucleotide polymorphisms (SNP) indicated that P. Zhaoxuanii forms an independent branch inside Pirus and is classified in the eastern clado, P. Subg. Pashia. Currently, this species has only been registered in Danxiahan’s National Nature Reserve. Taking into account its potential distribution and population size, we recommend classifying this species as less concern (LC) in accordance with the classifications and criteria of the IUCN red list.
Keywords: Danxia landscape, new species, phylogeny, Pirus
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| Line drawing Pirus Zhaoxuanii A plant in Flower B fruit plant C flower d Fruit appearance E sheet F pistil G longitudinal section of flower h longitudinal and cross section of fruit and sprout scales j stamens. Scale bars: 5 cm (a, b); 1 cm (C, D, E, F, G); 2 cm (h); 2 mm (i); 5 mm (J). Illustrated by Si-Rui Pan. |
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| Flower and Poma of Pirus Zhaoxuanii A frontal dissection of the BC stamens flower Longitudinal section of the front view of the entire flower and longitudinal sections of the cross section of the ovary. Scale bars: 1 cm (A, E); 5 mm (B, C, D, F). |
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| Pirus Zhaoxuanii A plant, with many branches and habitat of B thorns, which grows on the edge of cliffs or steep slopes with many subdivisions and spines of lenticels in young branches and surface of the stem F, g of leaves during the fruit period H, I leaves and scales with the hair j, k flowers l, m fruit N, or comparison of P. Zhaoxuanii(left) and P. Calleryana (good). |
Pirus Zhaoxuanii Xwyi, bbliu and q.fan, sp. nov.
Chinese name. 昭璇梨
Diagnose. Pirus Zhaoxuanii It is similar to P. CalleryanaBut it can be differentiated by its small obovate leaves, short petioles, stem spines pronounced and habit of bush.
Etymology. Pyrus zhaoxuanii is appointed in honor of the teacher. Zhao-Xuan Zeng (1921–2007), a famous geographer of the Normal University of Southern China, who made a significant contribution to the study of Danxia’s landscape.
#Botany #Pyrus #Zhaoxuanii #Rosaceae #species #pear #Danxiahan #mountain #Guangdong #China
