Prostrate milkweed, a rare plant native to Texas and northeastern Mexico, is part of an import support system for bees and monarch butterflies. But now, the U.S. Fish and Wildlife Service is considering naming the plant an endangered species as humans destroy their critical habitats. The prostrate milkweed's flowers attract and support native pollinators, including large bees and wasps, and it serves as a host plant for monarch butterflies. “Unfortunately, this species is negatively impacted by competition from introduced buffelgrass and increased development in its native Tamaulipan shrubland habitat.”