O

Obione portulacoides — see Halimione portulacoides

Oenothera

Olea europaea

Olearia

Omphalodes

Ononis

Ophiopogon

Opuntia

Orbea

Origanum

Ornithogalum

Orphium frutescens

Oscularia deltoides

Osmanthus

Osteospermum

Osyris alba L.

Otanthus maritimus

Othonna

Othonna maritima — see Jacobaea maritima 3

Othonopsis cheirifolia — see Hertia cheirifolia

Oxalis

Ozothamnus rosmarinifolius

3 - This plant has the potential to become naturalized in mediterranean climates.

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