Shortish and sturdy plant compared to the Showy Milkweed. If I had given it a common name, I would have called it Cabbage Leaf Milkweed. (“Sand” is so easy and not at all descriptive.) I first found this north and east of North Sterling Reservoir up near the wind towers. I have since found two at the far western end of the walking path at the reservoir. Apparently it is a common milkweed in western Kansas. This is the sixth milkweed I have found in northeast Colorado. I’m sure there are more. The little five-petal flowers appear on all milkweeds. Wikipedia lists 144 species of the plant in this country, not counting the many subspecies.
The seed pod.