Apparently, it is possible to induce an impossible cross to mature a seed without aborting. However, the embryo may still be immature. This is all conjecture though without growing up via tissue culture the resulting immature seedling.
Fully developed seed/immature embryo
Awesome pic. When I find immature seeds, I wil try and plant them as soon as I can, I don't let them sit out and dry. I put the seeds in some sterile seed starting mix and cover and hope for the best.
In the begining all I had was a bunch of moldy seeds or one s that just shriveled up and died. Even tried rehydrating those seeds just to see what would happen, but had no luck on germinating them.
I had tried dipping them in a hyrdrogen peroxide solution first and had burn of the seed.
Now from this part of this article I posted for you the other day. " The seeds should have the nubblet where the seed attached to the tissue of the mother plant pressed into the soil.:
When I have taken the time to carefully type and cut an extract the seed instead of just pulling it off and planting, I have had a little bit of success. Even germination of one or two plants is better than none. I have been able to get them to grow, but then have lost them to fungal disease in early stage. Have no idea what effect a weak fungicide treatment would do to them . The problem is you may only have one pod and a few seeds and that is all you have to work with until the following year to try the cross again. Get very frustrating some times.