Epithets
| Name | Description |
|---|---|
| obtusifolia |
blunt leaved |
| occidentalis |
of the west |
| occulta |
hidden |
| odorata |
fragrant,scented |
| odoratus |
fragrant,scented |
| odorus |
fragrant,scented |
| officinalis |
sold as an herb; medicinal |
| orbicularis |
circular |
| orbiculatus |
circular |
| orbiculus |
circular |
| oreophila |
mountain loving |
| oreophilum |
mountain loving |
| osteosperma |
bony seed |
| osteospermus |
bony seed |
| oxy- |
prefix meaning "sharp, pointed" |