Primulina linearicalyx (Gesneriaceae), a new species from Guangxi, China

Primulina linearicalyx from Wuming County, Guangxi, is illustrated and described here. It is morphologically close to P. linearifolia , P. pseudolinearifolia and P. longgangensis , but it can be easily distinguished by the exceptionally long and linear-lanceolate to linear calyx lobes. The chromosome number for this species, being reported the first time, was determined to be 2n =36. The conservation status of the new species was assessed as “Critically Endangered” (CR) based on IUCN criteria.