geobotany

noun

science of interactions between geography and plant life

Wiktionary

noun

Etymology: Etymology tree Pre-Greek der. Proto-Hellenic *gayader. Ancient Greek γαῖᾰ (gaîă)clip. Ancient Greek γῆ (gê) Ancient Greek -ο- (-o-) Ancient Greek γεω- (geō-)der. English geo- English botany English geobotany From geo- + botany.

The branch of biogeography that is concerned with the geographic distribution of plant species.