VASCULAR PLANTS OF UPPER NEWPORT BAY
UPPER BAY SPECIES WHOSE GENUS NAMES BEGIN WITH "O"
AS COMPILED BY ROBERT DE RUFF
# After a name indicates that the plant is a California Native
* After a name denotes that this is an older name, not one in use at this time
Family names in parenthesis are the new names as shown in
Roberts' 2008 Checklist of Vascular Plants of Orange County






































GENUS NAME FAMILY NAME














Oenothera bistorta* # Onagraceae






Oenothera cheiranthifolia ssp. suffruticosa* # Onagraceae






Oenothera elata ssp. hirsutissima # Onagraceae






Oenothera hirta* # Onagraceae






Oenothera hookeri* # Onagraceae






Oenothera micrantha* # Onagraceae






Oenothera speciosa Onagraceae






Oenothera speciosa var. childsii* Onagraceae






Olea europaea Oleaceae






Oligomeris linifolia # Resedaceae






Opuntia engelmannii var. linguiformis Cactaceae






Opuntia ficus-indica Cactaceae






Opuntia hybrid #1 Cactaceae






Opuntia hybrid #2 Cactaceae






Opuntia littoralis # Cactaceae






Opuntia littoralis var. austrocalifornica* # Cactaceae






Opuntia oricola # Cactaceae






Opuntia prolifera * # Cactaceae






Opuntia x demissa # Cactaceae






Opuntia x occidentalis # Cactaceae






Opuntia x vaseyi # Cactaceae






Orthocarpus purpurascens var. purpurascens * # Scrophulariaceae (Orobanch)






Oryzopsis miliacea* Poaceae






Osteospermum ecklonis Asteraceae






Oxalis corniculata Oxalidaceae






Oxalis cernua* Oxalidaceae






Oxalis pes-caprae Oxalidaceae