Perezia magellanica 
Pericallis cruenta 
Phagnalon barbeyanum 
Phagnalon graecum 
Phagnalon nitidum 
Philadelphia fleabane 
Picris asplenioides 
Picris cyanocarpa 
Picris strigosa 
Pineappleweed 
Pink and white everlasting 
Pink Hawk's-Beard 
Pink Thoroughwort 
Pinnate prairie coneflower 
Plain treasureflower 
Plains coreopsis 
Pliant Lettuce 
Polychrysum 
Pompom weed 
Pot marigold 
Prairie fleabane 
Prickly Lettuce 
Prickly sow-thistle 
Pseudopodospermum libanoticum