Abstract

A new species of Parasenecio, P. lanpingensis, was described in Lanping County, Yunnan Province, China. Morphologically, P. lanpingensis shares several key features with species in sect. Monanthae of Parasenecio, such as the white pappus, villous stem and ovate‒triangular leaf. However, it can be easily distinguished from other Parasenecio species by its hairy, purplish‒red stem, petiole, abaxially leaf blade and adaxially leaf vein. Phylogenetic analysis including 163 related species of trib. Senecioneae based on two nuclear DNA fragments (ITS and ETS) demonstrates that P. lanpingensis is clearly clustered within Parasenecio, and P. lanpingensis is closely related to P. cyclotus and P. koualapensis. Overall, both morphological and phylogenetic evidences strongly support the classification of P. lanpingensis as a newly described species. A comprehensive description of this species is provided, including the detailed illustrations and photographs, geographical distribution, habitat and ecology, as well as its IUCN conservation status.

Keyword: ETS, ITS, Parasenecio, Parasenecio cyclotus, Parasenecio koualapensis, sect. Monanthae, phylogeny

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