Abstract
Primulinasilaniae X.X.Bai & F.Wen, a new species of Primulina Hance (Gesneriaceae) from the limestone area of Wangmo County, Guizhou Province, is described and illustrated. The new species is similar to P.spiradiclioides Z.B.Xin & F.Wen, but can be easily distinguished from the latter by a combination of characteristics, especially in the lateral veins of its leaf and floral shape and tube. At present, three populations in one locality of this new taxon were found, totaling about 600 mature individuals. According to the IUCN Red List Categories and Criteria (Version 3.1), the species is provisionally assessed as Vulnerable [VU D1].
Highlights
In July 2020, when we investigated plants in Wangmo County, we found a plant on moist, shady limestone cliffs that appeared to represent an undescribed species of Primulina based on its old fruits and leaves
We photographed the flowers and collected the specimens in November 2020. Comparing these specimens and living plant materials with the type specimens and protologues of all 219 species of Primulina, we found that these specimens and plants neither fit the existing protologues nor conformed to the type specimens of these species
The plant material for description was collected in the field at its type locality in 2020
Summary
The type species of this genus is P. tabacum Hance, which once was considered a rare cave plant in limestone montane areas and collected in Lianzhou City, Guangdong Province, China (Wang et al 2013). As a result of this reorganization and newly described species, the newly defined Primulina has become the most diverse genus of Gesneriaceae in China (Li and Wang 2007; Möller et al 2009, 2011; Wang et al 2011; Weber et al 2011).
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