Isodon atroruber (Lamiaceae)：A Newly Recorded Species from China

Isodon atroruber R. A. Clement,collected from Cuona County in Tibet,is a new record for China. The species is described and illustrated here. Scanning electron microscopy and light microscopy are carried out to examine the micromorphology of the leaf epidermis,pollen,and mericarp of the species. A key to 19 taxa of Isodon distributed in Tibet is also provided.