湖南德夯地质公园唇形科植物的多样性特征OA

Through field surveys,specimen identification,morphological observations,and landscape clas-sification,this study systematically investigated the characteristics of Lamiaceae plant diversity in Dehang Geological Park,Hunan Province.Results showed that a total of 53 species belonging to 23 genera of Lamiaceae were recorded in Dehang,with Scutellaria and Salvia as dominant genera.The floristic com-position was complex,showing predominantly temperate affinities at the generic level and mainly Chinese endemics at the species level,with high proportions of shared species in regions of central China,south-west China,and eastern China.Leaf shape and phyllotaxy exhibited typical Lamiaceae features,while leaf margin types,texture,and trichome types were diverse,with serrate or crenate margins,herbaceous leav-es,and both surfaces covered with hairs being predominant—important phenotypic adaptations to sub-tropical mountain habitats.Inflorescences were primarily racemose,mostly axillary,flowering concentrat-ed from July to August,and fruiting from August to October,indicating strong adaptation of reproduc-tive traits to local hydrothermal conditions and pollination environments.Lamiaceae plants occurred across 11 landscape types,predominantly in the Hengxia slope and floodplain landscapes,with sparse dis-tribution in arid rock faces and cliff-top terraces.Overall,Lamiaceae in Dehang exhibit rich species diver-sity,unique floristic composition,highly adapted reproductive strategies,and distinct landscape distribu-tion patterns.