1. Low shrubby plant having yellow flowers with four petals arranged in a cross; Bermuda and southeastern United States to West Indies and eastern Mexico
   - low St Andrew's cross

Type of: St John's wort

• onion stem
• onion thrips
• onion yellow dwarf
• onion yellow-dwarf virus
• onionskin
• Oniscidae
• Oniscus
• online
• onlooker
• onlooking
• only
• only if
• only too
• only when
• Ono
• Onobrychis
• Onobrychis viciaefolia
• Onobrychis viciifolia
• Onoclea
• Onoclea sensibilis
• Onoclea struthiopteris
• onomancer
• onomancy
• onomastic
• onomasticon