Asclepias asperula subspecies asperula has the rich purple throughout the hoods. Generally a more upright growth habit. Tends to remain green thru dry summers in the southwestern United States. Although it will emerge from dormancy a bit later in spring and the seeds ripen and the stem senesces earlier September.
I’ve had the fortune to collect seeds which are in my store. The 2022 seed are viable and less sats. The 2023 seed are viable and a good value. It is taking some years to get them established in my own garden. https://www.growmilkweedplants.com/product-page/asclepias-asperula-spider-milkweed-seed
Not always obvious from far away. Monarch larvae are often found under the leaves.
