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| Sedum guangxiense Yan Liu & C.Y.Zou, in Zou, T. Meng, S.-Y. Meng et Liu, 2025. |
Abstract
A new species, Sedum guangxiense sp. nov., discovered in Guangxi Province, China, is described and illustrated. Molecular phylogenetic analyses and morphological differences indicate that this species is well separated from its close relatives in Sedum, justifying its recognition as a distinct new species. Morphologically, it closely resembles Sedum tosaense and S. emarginatum in its leaf shape, inflorescence type and life form, but it can be easily distinguished in its erect stems when young, much larger leaves, narrowly triangular petals, ovate nectar scales and oblong anthers.
Key words: Phylogeny, sect. Sedum, Sedum guangxiense, taxonomy
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| Sedum guangxiense A plant in flower B sterile plant C inflorescence from below D flowering branch E strongly unequal sepals F side view of a flower with carpels removed, showing the sepals, petals, stamens and nectar scales G adaxial leaf surface H unripe follicles I carpels connate at the base in longitudinal section J ovules K abaxial leaf surface. A, photographed by Hai-ling Chen in Fangcheng District (corresponding to the holotype H. L. Chen ZCY1978); B, C, photographed by Chun-Yu Zou in Yongfu County (corresponding to the paratype C. Y. Zou & J. Q. Huang, ZCY1977). |
Sedum guangxiense Yan Liu & C.Y.Zou, sp. nov.
Diagnosis. Sedum guangxiense is similar to S. tosaense and S. emarginatum in its leaf shape and inflorescence type, but can be distinguished from the latter two by its erect stems in youth (vs. prostrate when young), much larger leaves (1.5–3.5 cm long vs. 1–2 cm), narrowly triangular petals (vs. narrowly elliptic-lanceolate and linear-lanceolate to lanceolate), ovate nectar scales (vs. subquadrangular and oblong) and larger, oblong anthers (rather than oblong-ovoid).
Etymology. The specific epithet refers to the distribution in Guangxi Province, China.
Chun-Yu Zou, Tao Meng, Shi-Yong Meng and Yan Liu. 2025. A New Species of Sedum (Crassulaceae, Saxifragineae) from Guangxi, China. PhytoKeys. 252: 287-299. DOI: doi.org/10.3897/phytokeys.252.128011
