The Collaborative International Dictionary
Phytogenesis
Phytogenesis \Phy`to*gen"e*sis\, Phytogeny \Phy*tog"e*ny\, n. The doctrine of the generation of plants.
Wiktionary
phytogenesis
n. 1 (context biology English) The origin and evolutionary development of plants. 2 (context biology English) The development of a plant from the embryo