| Flowering Plants (Angiosperms) |
| Page 4 |
| Nymphaeaceae to Rutaceae |
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Nymphaeaceae (Water Lily) | |
| Oleaceae (Olive) | ||
| Onagraceae (Evening-Primrose) | ||
| Orchidaceae (Orchid) | ||
| Orobanchaceae (Broomrape) | ||
| Oxalidaceae (Wood-Sorrel) | ||
| Papaveraceae (Poppy) | ||
| Passifloraceae (Passion Flower) | ||
| Poaceae (True Grasses) | ||
| Polemoniaceae (Phlox) | ||
| Polygalaceae (Milkwort) | ||
| Polygonaceae (Buckwheat) | ||
| Pontederiaceae (Water Hyacinth) | ||
| Portulacaceae (Purslane) | ||
| Primulaceae (Primrose) | ||
| Pyrolaceae (Wintergreen) | ||
| Ranunculaceae (Buttercap) | ||
| Rhamnaceae (Buckthorn) | ||
| Rhizophoraceae (Mangrove) | ||
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Rosaceae (Rose) | |
| Rubiaceae (Madder) | ||
| Rutaceae (Citrus) |
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