Impatiens beipanjiangensis (Balsaminaceae), a new species from Guizhou, China.

Impatiens beipanjiangensis Jian Xu & H. F. Hu (Balsaminaceae), a new species of Impatiens subg. Clavicarpa discovered in Guizhou, China, is described and illustrated in this study along with its molecular phylogenetic analysis. I. beipanjiangensis is similar to I. liboensis, I. chishuiensis and I. clavigera in morphology, but I. tubulosa has the closest relationship to it. However, there are various ways in which the new species can be easily distinguished from these four species: Inferior nodes swollen rhizoid, pale green and with hooked outer sepals, longer lateral united petals, subovate auricle, deeper lower sepal and shorter spur that is reflexed towards the lower sepal. Furthermore, I. beipanjiangensis is distinguished from other Impatiens species, based on morphological, micromorphological and palynological evidence and molecular data (PP 0.967). [ABSTRACT FROM AUTHOR]