Distribution of Isotrema brevilimbum, I. ovatifolium, and I. wardianum based on field observation, specimens and literatures examined.

 
 
  Part of: Wang J, Ya J-D, Liu C, Liu G, Cao F, Ma J-S, Zhu X-X (2020) Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China: II. I. brevilimbum (Aristolochiaceae), a new species from Guizhou, China. PhytoKeys 152: 15-25. https://doi.org/10.3897/phytokeys.152.51760