Ok here we go:
n°2: A while back we were talking about this one and the yellow flowering. Must be sinforosensis ssp cobrensis ( yellow and red flowers) or just sp. El Cobre.
N°6: Take good care of this one. Very rare and not often seen in collections: M. xanthina. If you have seeds or a spare one, you know my address.
N°7: M. sonorensis yellow spined form and the other the red spined form