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| Microtoena wawushanensis Xue X. Wu & Qiang Wang, in Wu, Y. Wang, Chen et Q. Wang, 2024. |
Abstract
Microtoena wawushanensis, a new species from Sichuan, China, is described and illustrated here. The new species is closely related to M. moupinensis and M. prainiana, but differs distinctly from both in leaf, calyx and bract morphology. It is further distinguished by its highly variable and unstable calyx tooth ratio (1.36–2.13), red-marked lateral lobes on the lower corolla and filaments that are barbate at both the upper and basal parts, with nearly imperceptible hairs in the middle section. Phylogenetic analyses, based on 81 coding regions of the chloroplast genome, suggest that M. wawushanensis belongs to sect. Delavayana and is sister to a clade formed by M. urticifolia, M. prainiana and M. megacalyx.
Key words: Lamiaceae, Microtoena, new taxon, taxonomy
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| Images of Microtoena wawushanensis sp. nov. A individual in the flowering period of wild populations B, C inflorescence in lateral view D lower corolla lip E dissected calyxes (outside & inside) F calyxes G bracts H leaves I dissected corolla (containing filaments) and corola. |
Microtoena wawushanensis Xue X. Wu & Qiang Wang, sp. nov.
Diagnosis: Microtoena wawushanensis is morphologically similar to M. moupinensis (Franch.) Prain and M. prainiana Diels (Table 2), but differs from M. moupinensis and M. prainiana by having a crenate leaf margin with distinct mucrones (vs. with or dentate without any mucro), a cuneate to truncate-subcordate leaf base (vs. truncate-subcordate or cuneate leaf base), a lax, more or less compact to spike-like panicle inflorescence (vs. inflorescence sometimes with one-sided branches or ...
Xue-Xue Wu, Yan Wang, Yan-Yi Chen and Qiang Wang. 2024. Microtoena wawushanensis (Lamiaceae, Lamioideae): A New Species from Sichuan, China. PhytoKeys. 250: 223-236. DOI: doi.org/10.3897/phytokeys.250.139362
