Families of seed plants O

Foto header: Orchis Tourn. ex L. (Orchidaceae) © Luo Chen

Oleaceae

Families of Seed Plants O

This list of genera was made in January 2024 according to Plants of the World Online and Stevens 200 [...]

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Onagraceae

Families of Seed Plants O

This list of genera was made in March 2025 according to World Flora Online, Plants of the World Onli [...]

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Orchidaceae

Families of Seed Plants O

This list of genera was made in December 2025 according to Plants of the World Online. This list inc [...]

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Orobanchaceae

Families of Seed Plants O

This list of genera was made in January 2025 according to World Flora Online, Plants of the World On [...]

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