phytology

Etymology tree
Proto-Indo-European *bʰuH-
Proto-Indo-European *-yéti
Proto-Indo-European *bʰuHyéti
Ancient Greek φύω (phúō)
Ancient Greek φῠτόν (phŭtón)der.
English phyto-
Proto-Indo-European *leǵ-
Ancient Greek λόγος (lógos)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ῐ́ᾱ (-ĭ́ā)
Ancient Greek -λογῐ́ᾱ (-logĭ́ā)bor.
Latin -logialbor.
French -logiebor.
English -logy
English phytology
From phyto- + -logy.