Figure 1 from: Nguyen CH, Nguyen LV, Nguyen KS, Egorov AA, Averyanov LV (2021) Hemiboea chanii (Gesneriaceae), a new species from limestone areas of northern Vietnam. PhytoKeys 183: 108-114. https://doi.org/10.3897/phytokeys.183.69180 - Nguyen, Cuong Huu (2021)