O. lutea may refer to:
Odontadenia lutea, a vine native to South America Odostomia lutea, a sea snail Oiketicoides lutea, a moth native to the Mediterranean Oncis lutea, synonym of Platevindex luteus Ophiocordyceps lutea, a parasitic fungus Ophrys lutea, an orchid native to the Mediterranean Orchis lutea, synonym of Dactylorhiza sambucina Orobanche lutea, synonym of Orobanche variegata Oxystylis lutea, synonym of Cleomella oxystyloides