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| Lysimachia danxiashanensis W.B.Liao, Q.Fan & G.D.Tang, in Zhang, Dai, Fan, Chen, Tang et Liao, 2024. |
Abstract
Lysimachia danxiashanensis, a new Primulaceae species, endemic to the Danxia landscape in Guangdong Province, China, is described and illustrated. This new species is morphologically similar to L. pseudohenryi, L. phyllocephala, L. congestiflora and L. kwangtungensis, but it differs from the similar species by its purplish-red plants, petiole without wings, calyx with orange glandular and the corolla margin serrated on upper half with orange-red glandular punctates. This new species belongs to Lysimachia subgen. Lysimachia sect. Nummularia. Phylogenetic analysis confirmed that L. danxiashanensis is a distinct clade, based on the combined data of ITS and rbcL sequences. The conservation status of the new species was evaluated as Endangered (EN) according to IUCN Red List Categories and Criteria.
Key words: Danxia landscape, IUCN Red List, Lysimachia, taxonomy
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| Lysimachia danxiashanensis W.B.Liao, Q.Fan & G.D.Tang, sp. nov. A habit B flowering branch C inflorescence D abaxial and adaxial views of leave E lateral view of flower F dorsal view of flower G adaxial side of corolla lobes H stamens I immature capsule J abaxial (1st, 2nd, 5th) and adaxial (3rd, 4th) views of calyx lobes K pistil and densely pilose pedicel L stigma M cross-section of ovary (Photographers: A, C, D, I by Xing-Yue Zhang; B, E, F by Qiang Fan; G, H, J–M by Jing-Min Dai). |
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| Lysimachia danxiashanensis W.B.Liao, Q.Fan & G.D.Tang, sp. nov. A habit B abaxial (left) and adaxial (right) views of leaf C adaxial side of corolla lobes D lateral view of flower E dorsal view of flower F stamens G pistil and stigma H fruit I adaxial (left) and abaxial (right) views of calyx (Drawn by Rong-En Wu). |
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| Morphological differences between [A] Lysimachia congestiflora and [B] L. danxiashanensis 1 plants 2 corolla lobes 3 calyx lobes 4 petiole (Photographers: A–1 by Wan-Yi Zhao A2–4 by Xin-Xin Zhu B1, 2, 4 by Xing-Yue Zhang B–3 by Qiang Fan). |
Lysimachia danxiashanensis W.B.Liao, Q.Fan & G.D.Tang, sp. nov.
Diagnosis: Lysimachia danxiashanensis can be distinguished from L. congestiflora by its purple-red plants (vs. green), petiole without wings (vs. narrowly winged), corolla lobes yellow with serrations on upper half (vs. dull red at base with entire margin) and calyx with orange glandular (vs. without glandular) (Fig. 4).
Xing-Yue Zhang, Jing-Min Dai, Qiang Fan, Zai-Xiong Chen, Guang-Da Tang and Wen-Bo Liao. 2024. Lysimachia danxiashanensis, A New Species of Primulaceae from Guangdong, China. PhytoKeys. 237: 257-268. DOI: 10.3897/phytokeys.237.114484
