Ornithidium aureum 
Ornithidium nubigenum 
Ornithocephalus dalstroemii 
Ornithogalum boucheanum 
Ornithogalum fuscescens 
Ornithogalum lanceolatum 
Ornithogalum neurostegium 
Ornithogalum orthophyllum 
Ornithogalum refractum 
Ornithogalum sigmoideum 
Ornithogalum trichophyllum 
Otoglossum scansor 
Otoglossum serpens 
Otostylis paludosa 
Pacific coralroot 
Pacific Ground Orchid 
Palawan Coelogyn 
Pale Orchid 
Pale Reed Orchid 
Pale umbrella orchid 
Pale vanilla lily 
Pale yucca 
Paleoagave bracteosa 
Palestine Iris