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| Paraphlomis hsiwenii Y.P.Chen & Xiong Li, in Chen, Xiao, Xiang et Li, 2022. (photographed by Xiao-Lei Ma, Xiong Li, Ya-Ping Chen, Jin-Fei Xiao). |
Abstract
The indumentum of nutlets is shown to be of phylogenetic importance in previous molecular phylogenetic studies of Paraphlomis, a genus of Lamiaceae with approximately 30 species distributed mainly in southern China and Southeast Asia. Nearly half the species of Paraphlomis are known from limestone areas. In this study, we described and illustrated a new species, P. hsiwenii, from the karst mountain forests in Guangxi Zhuang Autonomous Region, China. Our molecular phylogenetic analyses revealed that P. hsiwenii is recovered in a clade consisting of species with hairy nutlets. The new species is morphologically most similar to P. pagantha from the same clade, but they differ in the morphology of lamina bases, length of pedicels and calyces, as well as the morphology of upper corolla lips.
Keywords: Ajugoides, karst, Matsumurella, nutlet, Paraphlomideae
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| Morphology of Paraphlomis hsiwenii from the type locality A, B habitat C–E habit F leaves G stolons. Scale bar: 5 cm (A, C photographed by Xiao-Lei Ma B, D, E photographed by Xiong Li F photographed by Ya-Ping Chen G photographed by Jin-Fei Xiao). |
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| Floral traits of Paraphlomis hsiwenii. A frontal view of flowers B dorsal view of flowers C lateral view of flowers D lateral view of calyces E frontal view of calyces F dissected calyx G dissected corolla and lateral view of corolla H lateral and frontal view of ovary I lateral view of nutlet. Scale bars: 2 mm (F); 4 mm (G); 500 μm (H) (A–C, G, H photographed by Jin-Fei Xiao D–F photographed by Ya-Ping Chen I photographed by Xiong Li). |
Paraphlomis hsiwenii Y.P.Chen & Xiong Li, sp. nov.
Type
China, Guangxi, Jingxi City, Nanpo Town, Longting, Diding Natural Reserve, among shrubs in forests of limestone area, 23°3'29.55"N, 105°57'13.82"E, alt. 1181 m, 25 Jun 2022, J.F. Xiao & X.L. Ma XJF095 (holotype: !; isotypes: K!, KUN!, MO!, PE!).
Diagnosis: Paraphlomis hsiwenii is morphologically most similar to P. pagantha, but differs in having laminas glabrous above (vs. sparsely strigose above), bases of laminas not decurrent (vs. decurrent), calyces ca. 6 mm long (vs. ca. 4 mm long) with teeth ca. 2 mm long (vs. ca. 1 mm long), and upper corolla lips emarginate at apex (vs. entire at apex).
Ya-Ping Chen, Jin-Fei Xiao, Chun-Lei Xiang and Xiong Li. 2022. Paraphlomis hsiwenii (Lamiaceae), A New Species from the Limestone Area of Guangxi, China. PhytoKeys. 212: 85-96. DOI: 10.3897/phytokeys.212.91174