So far I've gotten:
Whirlyflower + Striped Eggplant = Tiger
Sunflower+ Spotted Eggplant = Eggplant
Spotted Eggplant + Striped Leaf = Whirlyflower
Striped Leaf + Eggplant = Striped Eggplant
For the rest I've gotten one or the other parent. I will keep trying. It does seem that it does at least sometimes follow the logic, like with the striped leaf and the eggplant making a striped eggplant. I also got some before I was tracking that made sense, like Sunflower+Surfer Leaf=Sunsurfer. (That's from memory, though, so don't quote me on that one.)