Milkweeds

Question

I have located milkweed in my area, southeast Id./northern Ut., that resemble antelope horn milkweeds, but have beautiful purple flowers and a darker green leave around them. They do not grow in swampy areas, but in dry sidehills or disturbed areas. Are they another variety of the antelope horn? I gathered a few seeds from the plants when the kids opened. Will they die if they are stored at room temperature, and do they need cold stratification.

Answer 1

They are likely a different species of Milkweed.
Here is a link that may help you with identification.

http://www.xerces.org/wp-content/uploads/2013/07/Milkweeds-of-Central-US_plus-vendors_XercesSociety.pdf