They look right except the pod seems awfully small. All the crassicarpus pods that I have seen are about double that size, about an inch in diameter. Perhaps it is just our climate differences. You might also want to look at the Genus Physaria, P. didymocarpa perhaps?
Astragalus and Physaria seed are warm germinators and technically do not need a cold treatment. They do have an impervious seed coat that requires some degradation or break in its integrity to allow for water absorption. This is where a cold freezing winter is advantageous. It can create micro fissures in the seed coat that will allow water to be imbibed and the seed germinates. Or you can do what what seasoned rock gardeners do: scarify the seed before planting and skip the winter.
I am betting that both the black and the brown seeds are viable. And that the black seeds are just more mature (and probably have a more impervious seed coat). I have seen a few "normal" brown seeds when I encounter seed, but usually they look like this: good black seed with brown bits that were never fertilized.
