Nuttall's toothwort 
Ochradenus arabicus 
Ochradenus aucheri 
Ochradenus baccatus 
Ochthodium aegyptiacum 
Odontarrhena muralis 
Papaya 
Peltaria angustifolia 
Perennial Candytuft 
Perennial honesty 
Perennial wall-rocket 
Phoenicaulis 
Physaria alpestris 
Physorhynchus chamaerapistrum 
Prince's Plume 
Pseuderucaria clavata 
Radish 
Rapeseed 
Raphanus pugioniformis 
Reseda arabica 
Reseda aucheri 
Reseda decursiva 
Reseda globulosa 
Reseda orientalis