phytogeographyPronunciation: /ˌfʌɪtəʊdʒɪˈɒgrəfi/Definition of phytogeography noun [mass noun] the branch of botany that deals with the geographical distribution of plants. Also called plant geography.Derivatives phytogeographer noun phytogeographic adjective phytogeographical adjective phytogeography in other Oxford dictionaries Definition of phytogeography in the US English dictionary