Cao, W., Xiong, Y.-X., Zhao, D.-G., Qu, J.-J. & Tan, H.-Y. 2019. Porella perrottetiana var. angustifolia (Porellaceae, Marchantiophyta), new to China, and taxonomic revision of Porella perrottetiana in the East Yunnan-Guizhou Plateau. – Herzogia 32: 344 –356.
Porella perrottetiana var. angustifolia (Porellaceae, Marchantiophyta), a neglected variety known from North Vietnam, is reported here as a new addition to the Chinese liverwort flora from east of the Yunnan-Guizhou Plateau, SW China. It is characterized and distinguished from known Chinese species of Porella by attenuately ligulate or lanceolate and falcate leaf lobes with a long terminal and 0 – 4(–5) lateral ciliate teeth, median cells significantly larger than marginal cells, and by forming vitta from base to apex of leaf lobes. Detailed illustrations and description of this variety, an identification key to three varieties of Porella perrottetiana as well as a taxonomic revision of Porella perrottetiana in east of the Yunnan-Guizhou Plateau are provided.