Primulina marmorata (Gesneriaceae), a new species from northern Guangxi, China

Primulina marmorata, a new species of Gesneriaceae from the limestone areas of Siding Town, Rong’an County, liuzhou City, Guangxi, China, is described and illustrated here. It morphologically resembles P. yungfuensis in leaf blades. Still, it can be easily distinguished from the latter by noting a combination of characteristics, especially in its obviously larger bracts. We found only one population, about 10 000 mature individuals, at the type locality. According to the IUCN Red List Categories and Criteria (Ver. 3.1), the new species is tentatively designated as ‘Critically Endangered’ (CR).