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| Primula yanbianensis T.Shuai, Lei Cai & Z.K.Wu, in Shuai, Lin, Cai, Chen et Wu, 2025. |
Abstract
Primula yanbianensis T.Shuai, Lei Cai & Z.K.Wu, a new species of Primulaceae from Sichuan, China, is described and illustrated. Morphological evidence supports P. yanbianensis as a member of P. sect. Cortusoides, which is characterised by lack of farina, generally well furnished with multicellular hairs, subrounded leaf blades are more or less lobed, with distinct petiole and a deeply cordate base and campanulate or narrowly campanulate calyx not accrescent after anthesis. The new species is characterised by having umbel in whorls of 1–2, scape usually lower than leaf clusters, bracts broadly ovate and rose to pink petals distinctly veined. The distribution, morphological comparison with closely-related species and conservation status of the new species are also provided.
Key words: New species, Primula sect. Cortusoides, Sichuan, yan bian bao chun
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| Primula yanbianensis sp. nov. A habit B leaves, left: upper surface, right: lower surface C flower, left: thrum flower, right: pin flower D calyx and stigma E calyx and ovary. Drawn by Ms. Xiang-Li Wu. |
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| Primula yanbianensis sp. nov. A habitat B habit in flowering C fresh plant with roots D inflorescence E leaves, left: upper surface, right: lower surface F bracts and calyx G calyx and stamens H flower, front view I pin flower and thrum flower. Photographed by Z.K.Wu. |
Primula yanbianensis T.Shuai, Lei Cai & Z.K.Wu, sp. nov.
Diagnosis: The new species is most similar to P. neurocalyx, P. longipilosa and P. sinomollis, sharing multicellular hairs covering the plant, subrounded leaf blade are more or less lobed, with distinct petiole and a deeply cordate base and campanulate or narrowly campanulate calyx. However, the new species is distinguished from the latter three mainly by its scape usually being lower than leaf clusters, umbel is in whorls of 1–2, broadly ovate bracts and rose to pink petals are distinctly veined (Figs 1–3). The main morphological distinctions between P. yanbianensis, P. neurocalyx, P. longipilosa and P. sinomollis are summarised in Table 1.
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Etymology. The specific epithet of the new species is taken from the Chinese Pinyin “yanbian”, the name of the county in south-western Sichuan, China, where the type specimen was collected (Map 1).
Vernacular name. Chinese mandarin: yan bian bao chun (盐边报春).
Tian Shuai, Hong-qiang Lin, Lei Cai, Yu-fan Chen and Zhi-kun Wu. 2025. Primula yanbianensis (Primulaceae), A New Species in Primula sect. Cortusoides from Sichuan, China. PhytoKeys 252: 109-118. DOI: doi.org/10.3897/phytokeys.252.140026
