Who is the father of phytogeography?

The father of phytogeography is considered to be Alexander von Humboldt. Humboldt was a German naturalist and explorer who lived in the late 18th and early 19th centuries. He is best known for his extensive travels in the Americas, where he made important contributions to the study of plant distribution and ecology. Humboldt's work laid the foundation for the field of phytogeography, which is the study of the distribution of plants across the Earth's surface.