Paeonia obovata var. alba has the same grey green foliage like the species but single white flowers instead of pink. I don’t have a picture of the mother plant so just a fruits/seeds image, which are very much the same regardless of the flowers colour.
As I mentioned for P. japonica, some consider these two as synonyms. Because the seeds are from different sources I keep them separate as well. They may be or not the same species, and variability is great for grown from seeds peonies anyway.
Germination: sown any time but it needs a warm/moist period to form a root, followed by a cold/moist period for leaf emergence; depending on the sowing time it may take 2 years for a complete germination.