I know this is vague and I do not remember the Author or Title. I was about 12 and got the book in the library on the Sci-Fi rack…I am 30 now and my memory is fuzzy on the whole story so I will break it down as I remember the bits and pieces.
Starts out with a race of plant humanoids living in a secluded community.
Our Hero “Plant Man” I will call him is collecting eggs or rock climbing and gets his arm bitten off by a bird creature.
Stumpy arm heals…and an elder plant guy tells him to go to the homeland jungles to plant himself in the ground and regrow his arm because the soil and light is better than where they live now.
He goes across some deserts etc and finds the jungle lands and grows his arm back.
Then he learns that there are two split groups of plant people…the rulers and the slaves kind of like Roman times…
So Plant man meets the female princess and then he has sex with her…the strange pollination part where they have flower buds that open and bloom between their legs..the princess also likes to eat the bud of the person she has sex with..
Then Plant man leads a revolt etc, star wars style.
There you go from my days as a 12 year old.
Thanks