Ocimum basilicum |
Basil |
 |
Oenothera (many) |
Evening Primrose |
 |
Oenothera acaulis aurea |
Evening Primrose |
 |
Oenothera biennis |
Evening Primrose |
 |
Oenothera caespitosa |
Evening Primrose |
 |
Oenothera erythrosepala |
Evening Primrose |
 |
Oenothera missouriensis |
Missouri Evening Primrose |
 |
Olnea tesota |
Desert Ironwood |
 |
Onobrychis viciifolia |
Sainfoin |
 |
Ononis (many) |
Rest Harrow |
 |
Ononis cenisia |
Rest Harrow |
 |
Ononis repens |
Rest Harrow |
 |
Ononis spinosa |
Spiny Rest Harrow |
 |
Onosma taurica |
Golden Drop, Golden-Flowered Onosma |
 |
Opuntia ficus-indica |
Indian Fig Opuntia |
 |
Origanum (many) |
Marjoram |
 |
Origanum vulgare |
Wild Marjoram |
 |
Orlaya grandiflora |
Whiter Lace Flower |
 |
Ornithogalum (many) |
Star of Bethlehem |
 |
Ornithogalum pyramidale |
Star of Bethlehem |
 |
Orthrosanthus laxus |
Morning Iris |
 |
Osteospermum |
Cape Daisy |
 |
Osteospermum barberae |
Trailing African Daisy |
 |
Ostrya carpinifolia |
Hop Hornbeam |
 |
Otholobium glandulosum |
Culen |
 |
Oxalis (many) |
Sorrel |
 |
Oxalis corniculatus |
Yellow Sorrel, Sleeping Beauty |
 |
Oxalis lactea (magellanica) |
Sorrel |
 |
Oxypetalum caeruleum |
Sorrel |
 |
Oxytropis (many) |
Milk Vetch |
 |
Oxytropis |
Milk Vetch |
 |