New Mexico Agave, Mescal
Night-blooming Hesperaloe
Nuevo Leon Rosewood or Narrowleaf R
Ocahui
Ocotillo
Octopus Agave
Old Man Cactus
Old Man Saltbush
Oleander
Oleander Mrs. Roeding
Oleander Petite Pink
Oleander Petite Salmon
Oleander Sister Agnes
Olive
Olive Fruitless Swan Hill
Olive Majestic Beauty
Orange Bells
Orange bells
Organ Pipe
Our Lord's Candle