FIGURE 32 in Taxonomy, evolution and phylogeography of the genus Helonias (Melanthiaceae) revisited

FIGURE 32. Geographic ranges of Sect. Heloniopsis in Asia with presumable approximate course of range extension in past. A–D: Presumable approximate course of migration or extension of range of ancestral plants of Helonias. Ancestral plants are supposed to have arrived in or around present Tibetan Plateau from northern high latitudes (A; see also Fig. 31) and have further extended their range eastward (B, C) and northeastward (D).