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| Thismia guangdongensis X.J. Li, A.Liu & D.X. Zhang, in Li, Liu et Zhang, 2023. |
Abstract
Thismia guangdongensis, a fully mycoheterotrophic plant collected from Guangdong Province, China, is proposed and described as a new species. It is assigned to Thismia subsect. Brunonithismia based on having free tepals distinctly dissimilar in shape and size, and by phylogenetic evidence based on molecular data. This new species is morphologically similar to T. breviappendiculata from southern Myanmar, but easily distinguished from the latter by its orange campanulate hypanthium, inner surface of hypanthium with orange transverse bars, and filiform appendage of the inner whorl of tepals. With a plastome 20 379 bp in length and only 14 intact genes, the proposed new species has an extremely reduced plastome at the last stage of degradation, similar to most of the Thismia species previously studied.
Keywords: degradation of plastome, mycoheterotrophic, new species, phylogeny, Thismia
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| Thismia guangdongensis sp. nov. (a) Different developmental stages of Thismia guangdongensis collected from the type locality, b)inner face of hypanthium, showing the transverse bars, (c) stamen tube, side view, (d) style with stigma, (e) seeds. Scale bars: (a)= 1 cm, (b),(c) = 1 mm, (d) = 500 μm, (e) = 2 mm. |
Thismia guangdongensis X.J. Li, A.Liu & D.X. Zhang, sp. nov.
Xiaojuan Li, Ang Liu and Dianxiang Zhang. 2023. Thismia guangdongensis (Thismiaceae), A New mycoheterotrophic Species from China. Nordic Journal of Botany. DOI: 10.1111/njb.03819
