1. Milkweed of southwestern United States and Mexico; poisonous to livestock
   - poison milkweed, horsetail milkweed

Type of: milkweed, silkweed

• ostentatiousness
• osteo-
• osteoarthritis
• osteoblast
• osteoblastoma
• osteochondroma
• osteoclasis
• osteoclast
• osteocyte
• osteodystrophy
• osteogenesis imperfecta
• osteogenic sarcoma
• Osteoglossidae
• Osteoglossiformes
• osteoid
• osteologer
• osteological
• osteologist
• osteology
• osteolysis
• osteoma
• osteomalacia
• osteomyelitis
• osteopath
• osteopathic