Figure 2 from: Xu W-J, Qin W-H, Wang Z-Q, Li Z-L, Fu L-F, Hong X (2019) A new variety of Didymocarpus (Gesneriaceae) from Guangdong, China. PhytoKeys 128: 33-38. https://doi.org/10.3897/phytokeys.128.35446

Figure 2 The distribution areas of Section Heteroboea and their Parent material. The different colours represent the different Parent material: red – danxia landscape; yellow – granite landscape; green – karst limestone landscape; nlack – volcanic landscape).