Microtoenawawushanensis (Lamiaceae, Lamioideae): A new species from Sichuan, China

Xue-Xue Wu; Yan Wang; Yan-Yi Chen; Qiang Wang

doi:10.3897/phytokeys.250.139362

Microtoenawawushanensis (Lamiaceae, Lamioideae): A new species from Sichuan, China

PhytoKeys. 2024 Dec 30:250:223-236. doi: 10.3897/phytokeys.250.139362. eCollection 2024.

Authors

Xue-Xue Wu^{1

2}, Yan Wang^{1

2}, Yan-Yi Chen^{1

2}, Qiang Wang^{1

2}

Affiliations

¹ State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
² National Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.

Abstract

Microtoenawawushanensis, 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.

Keywords: Lamiaceae; Microtoena; new taxon; taxonomy.

Xue-Xue Wu, Yan Wang, Yan-Yi Chen, Qiang Wang.

Grants and funding

This study was supported by the Science & Technology Fundamental Resources Investigation Program (2022FY202200); the Survey of Wildlife Resources in Key Areas of Tibet (ZL202203601&ZL202303601); and the Youth Innovation Promotion Association, Chinese Academy of Sciences (Y2022032).