In biology|lang=en terms the difference between protogyny and protogynous
is that
protogyny is (biology) the condition in which an organism begins life as a female and then changes into a male while
protogynous is (biology) exhibiting protogyny.
In botany|lang=en terms the difference between protogyny and protogynous
is that
protogyny is (botany) the condition of flowers whose female parts mature before the male ones while
protogynous is (botany) whose female parts (archegonia]]) mature before the male parts ([[antheridium|antheridia) release their spermatozoids.
As a noun protogyny
is (biology) the condition in which an organism begins life as a female and then changes into a male.
As an adjective protogynous is
(biology) exhibiting protogyny.