Whilst milkweed has flower clusters like Joe Pye weed, they bear a Specific arrangement referred to as umbel inflorescence. Surprisingly, Just about all indigenous milkweed has milky white sap besides Butterfly Weed. The sap inside Butterfly Weed continue to holds some of that toxicity, but the color is not white. https://natural-bookmark.com/story18370698/new-step-by-step-map-for-are-milkweeds-perennials-or-annuals