Most of the seeds I kept in the fridge germinated already there in wet sand. I got a lot of the same looking seedlings, but one was completely different... maybe not a selfpollinated-one?
See photo's.
PS: Marnix attended me towards the first REAL leafs of all other than R. roxburghii seedlings: those look like Hawthorne leafs and do not have separate leaflets... Those of R. Roxburghii in the contrary are divided in leaflets!