Polyalthiopsis nigra. Credit: YANG Bin
Researchers from the Xishuangbanna Tropical Botanical Garden (XTBG) of the Chinese Academy of Sciences have collected and maintained a set of about 100 vegetation of Annonaceae, a big pantropical flowering plant household. Recently, observations of flower morphology within the Annonaceae assortment at XTBG have led to the identification of two unknown species belonging to the genus Polyalthiopsis.
The two unknown species have been launched from southeastern Yunnan in 2000 and from Napo, Guangxi, in 2002, respectively, however with none data on their areas or habitats. Fortunately, XTBG researchers recognized the areas and located these species within the wild in April 2021.
After morphological comparisons and phylogenetic analyses primarily based on 5 chloroplast areas, the researchers confirmed two new species and named them as Polyalthiopsis nigra and Polyalthiopsis xui respectively. Related outcomes have been printed in Plant Diversity.
Polyalthiopsis nigra is morphologically just like P. chinensis with lemon to yellowish inexperienced petals and shorter than seven mm lengthy pedicel, however clearly differs by having obovoid monocarps and the pericarp of the monocarps not secreting white liquid when injured, 15–25 pairs of secondary veins, the widest a part of leaf blades often above the center, leaf blades two to 3 occasions so long as extensive, and flowering from February to April.
It is thought solely from Napo County in Guangxi and Malipo County in Yunnan, southwest China. Since only a few particulars exist about its pure distribution, the researchers assigned its conservation standing as knowledge poor.
Polyalthiopsis xui. Credit: YANG Bin
Polyalthiopsis xui is morphologically just like P. floribunda with inflorescences axillary, one to 3 (or 4) flowers, elliptic leaves, petals elliptic-ovate, but it surely clearly differs by having carpels seven to 12 per flower, ovules two per carpel. It is thought solely from the kind locality in Maguan County, Yunnan. It often grows within the tropical rainforest of limestone areas, at elevations of 300–400 m.
Polyalthiopsis xui is called after Prof. Xu Zaifu, former director of XTBG, for his contributions to plant introduction and ex situ conservation. It is thought solely from the kind locality in southeastern Yunnan.
“Although its habitat is underneath safety close to Yunnan Daweishan National Nature Reserve, the forests are underneath extreme strain from agricultural enlargement, and the inhabitants and mature people are close to the roadside. We recommend the species be assessed as susceptible,” stated Tan Yunhong of XTBG.
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More data:
Bin Yang et al, Two new species of Polyalthiopsis (Annonaceae) primarily based on morphological characters and phylogenetic proof, with a supplementary description of P. chinensis from China, Plant Diversity (2022). DOI: 10.1016/j.pld.2022.05.001
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Two new polyalthiopsis species reported from China (2022, June 7)
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