* Opuntia (prickly pear cactus): This genus includes many species of cacti with prickly pads and spines.
* Oenothera (Evening primrose): Some species of Evening Primrose have prickly stems or leaves, but this isn't a universal characteristic.
* Oxalis (Wood sorrel): While not generally considered prickly, some varieties like the "O. articulata" (Pink sorrel) can have a prickly stem and leaves with a slightly rough texture.
It's worth noting that "prickly" is a relative term, and some plants might be considered prickly depending on your sensitivity to their texture.
