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| Chrysosplenium insularis J.E.Jang, K.H.Lee & H.Y.Gil, in Jang, Park, Lee, Kim et Gil, 2024. |
Abstract
We describe a new species, Chrysosplenium insularis J.E.Jang, K.H.Lee & H.Y.Gil, belonging to the family Saxifragaceae, from the southern islands of the Republic of Korea. Chrysosplenium insularis is morphologically similar to C. japonicum (Maxim.) Makino but can be distinguished by fairly persistent bulbils, green to yellowish-green sepals, four stamens, and cylindrical papillose seeds. Chrysosplenium insularis is also distinguished from C. alternifolium L., which is distributed in Europe, northern Russia, and the Caucasus, by the absence of stolons and green bracts. Phylogenetic analyses, based on one nuclear ribosomal (ITS) and two chloroplast (rbcL, matK) regions, confirmed that the new species was monophyletic and that C. insularis and C. alternifolium formed a sister relationship with robust support. Herein, we provide a detailed morphological description of C. insularis with its corresponding geographical distribution and comparison table and figures of related species.
Key words: Chrysosplenium, morphology, new species, phylogeny, taxonomy
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| Holotype of Chrysosplenium insularis. |
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| Chrysosplenium insularis A habit B bulbils C stem D basal leaf E inflorescence, F bracteal leaves G flower H, I capsule J seed. Photographs by Ju Eun Jang and Kang-Hyup Lee. |
Chrysosplenium insularis J.E.Jang, K.H.Lee & H.Y.Gil, sp. nov.
Diagnosis: Chrysosplenium insularis differs from C. japonicum in having fairly persistent bulbils, green to yellowish-green sepals, four stamens, and cylindrical papillose seeds.
Etymology: The specific epithet “insularis” refers to its distribution on islands.
Vernacular name: Island golden saxifrage: Seom-gwaeng-i-nun (섬괭이눈).
Ju Eun Jang, Beom Kyun Park, Kang-Hyup Lee, Hyuk-Jin Kim and Hee-Young Gil. 2024. Description and Phylogenetic Position of A New Species, Chrysosplenium insularis J.E.Jang, K.H.Lee & H.Y.Gil (Saxifragaceae), from the southern islands of South Korea. PhytoKeys. 248: 91-104. DOI: doi.org/10.3897/phytokeys.248.131291
