1. Perennial bushy herb of central and southern United States having white flowers with green centres and often purple crest; similar to Seneca snakeroot
   - senega

Type of: milkwort

• Ornithogalum
• Ornithogalum pyrenaicum
• Ornithogalum thyrsoides
• Ornithogalum umbellatum
• ornithological
• ornithologist
• ornithology
• ornithomimid
• Ornithomimida
• ornithopod
• ornithopod dinosaur
• Ornithopoda
• ornithopter
• Ornithorhynchidae
• Ornithorhynchus
• Ornithorhynchus anatinus
• ornithosis
• Orobanchaceae
• orogeny
• orography
• oroide
• orology
• Orono
• Orontium
• Orontium aquaticum