March 3, 2026Open Access

Sedum zhenghaianum (Crassulaceae), a new species from Zhejiang and Jiangxi, East China

Key Points

Sedum zhenghaianum is recognized as a new species distinct from Sedum tosaense, indicating significant taxonomic differences.
Morphological analysis highlights key features such as lacking sterile stems and exhibiting unique sepal shapes.
Phylogenetic analysis positions S. zhenghaianum closely to S. tosaense, based on nuclear ribosomal internal transcribed spacer sequences.
The findings could impact classification and understanding of the Sedum genus, calling for further research into its diversity.

Abstract

In this paper, Sedum zhenghaianum sp. nov. is described as a new species based on morphological and molecular analyses, and its taxonomic relationships are discussed. Morphological analysis indicates that S. zhenghaianum should be classified in the genus Sedum sect. Sedum and is distinct from the related species S. tosaense in morphology, e.g. by lacking sterile stems, rosulate leaves 4‐whorled, leaf blade and sepal apices retuse or obtuse, flowers pedicellate, ventral suture of follicles with a wing‐like membranous structure, and seeds with auricled protrusions. Phylogenetic analysis of sequences of the nuclear ribosomal internal transcribed spacer (ITS) further demonstrates that S. tosaense is the closest extant relative of the new species.

Sedum zhenghaianum (Crassulaceae), a new species from Zhejiang and Jiangxi, East China

Key Points

Abstract

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