This is still all more humanoid than I would like but does have some interesting details.
In the 80’s Alan Moore took on the moribund Swamp Thing character and created a magical series. His Swamp Thing is a plant who thinks he is a man. Since he can’t have sex with his human female lover he grows a fruit on his body for her so they can have a different kind of physical communion. She eats the fruit and goes on a magical, ecstatic, psychedelic experience with him. You can see this incredible segment in this compilation, Swamp Thing Vol. 1, Saga of the Swamp Thing