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Non-native Plant
Paederia foetida
Non-native Plant
Ottelia alismoides
Non-native Plant
Ornithogalum umbellatum
Non-native Plant
Orobanche ramosa
Non-native Plant
Orobanche minor
Non-native Plant
Orobanche hederae
Non-native Plant
Orobanche crenata
Non-native Plant
Orobanche cernua
Non-native Plant
Orobanche aegyptiaca
Non-native Plant
Onopordum illyricum
Non-native Plant
Onopordum acaulon
Non-native Plant
Onopordum acanthium
Non-native Plant
Oldenlandia lancifolia
Non-native Plant
Oenanthe javanica
Non-native Plant
Nymphoides peltata
Non-native Plant
Nymphoides cristata
