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| Primula jiangyouensis J.L.Gu & Z.K.Wu, in Gu, Wang, Lin, Jiang, Shuai et Wu, 2025. |
Abstract
Primula jiangyouensis J.L.Gu & Z.K.Wu, a new species of Primulaceae from Sichuan, China, is described and illustrated. Morphological evidence supports P. jiangyouensis as a member of P. sect. Auganthus, which is characterized by shallowly to deeply lobed leaves covered with hairs, and distinctively broad and flat-bottomed calyx. The new species is characterized by its branched and stout rhizomes usually up to 40 cm, yellow corollas with a distinct fan-shaped reddish-brown blotch at the base of lobes, and short glandular hair on aboveground parts. The distribution, morphological comparison with close related species and conservation status of the new species, as well as a key to the species of Primula sect. Auganthus, are also provided.
Key words: Conservation status, diversity, jiang you bao chun, taxonomy
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| Primula jiangyouensis sp. nov. A. Habit; B. Leaves, left: upper surface, right: lower surface; C. Flower, left: pin flower, right: thrum flower; D. Calyx and young fruit. Drawn by Ms. Xiang-Li Wu. |
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| Holotype of Primula jiangyouensis sp. nov. (GJL384, KUN!) |
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| Primula jiangyouensis sp. nov. A. Habitat; B, C. Flowering plants; D. Plant with roots and rhizomes; E. Leaves, left: upper surface, right: lower surface; F. Infructescences; G. Bracts and pedicels; H. Flower, lateral view; I. Longitudinal section of pin flower (left) and thrum flower (right); J. Calyx and young fruit; K. Longitudinal section of ovary; L. Ripe seed. Photographed by J.L.Gu and Z.K.Wu. |
Primula jiangyouensis J.L.Gu & Z.K.Wu, sp. nov.
Diagnosis. The new species is most similar to P. sinensis, P. rupestris, and P. xingshanensis, sharing hairs that covered the leaves and stems, lobed leaf blade, distinctly petiole and distinctively broad and flat-bottomed calyx. However, the new species is distinguished from the latter three mainly by its branched and stout rhizomes usually up to 40 cm, yellow corollas with a distinct fan-shaped reddish-brown blotch at the base of lobes, and short glandular hair on aboveground parts (Figs 1–4). The main morphological distinctions between P. jiangyouensis, P. sinensis, P. rupestris, and P. xingshanensis are summarized in Table 1.
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Jiu-Lin Gu, Hua-Dong Wang, Hong-Qiang Lin, Xiao-Qi Jiang, Tian Shuai and Zhi-Kun Wu. 2025. Primula jiangyouensis (Primulaceae), A New Species of Primula sect. Auganthus from Sichuan, China. PhytoKeys. 260: 25-35. DOI: doi.org/10.3897/phytokeys.260.158039
