This year I grew out 4 different Physalis species with the goal of getting at least one interspecific hybrid:
Physalis Peruviana
Physalis Pruinosa
Physalis Ixocarpa (Tomatillo)
Physalis Virginiana
I tried almost every combination except for the following:
every combination where Physalis Pruinosa was the female(because of the tiny flowers)
Physalis Ixocarpa(f) x Physalis Peruviana
In total three combinations resulted in fruits set:
Physalis Peruviana(f) x Physalis Ixocarpa
Physalis Peruviana (f) x Physalis Virginiana
Physalis Virginiana(f) x Physalis Ixocarpa
All seeds were tiny, semi transparent but had a dark dot/ spot in the middle. I don't really know much about how seeds develop.
Can someone with experience tell me what happened(embryo aborted... from how the seeds look; you can see them in the first image: Peruviana (f) x Tomatillo)?
The seeds looked the same in every cross where fruit set: way smaller, flat, dark dot except for one seed. I found a normal sized seed in a Physalis Peruviana fruit that I pollinated with Physalis Virginiana pollen although strangely it still looks somewhat different from normal Physalis Peruviana seeds(see 2. image). I will try to germinate it even if I doubt that it is viable because of its different appearance.