Asclepias subverticillata asc·le·pias·subverticillata uncommon noun 1. milkweed of southwestern United States and Mexico; poisonous to livestock Synonymspoison milkweedhorsetail milkweedAsclepias subverticillata Related words Broader terms milkweed WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
