Penny cress 
Pennyroyal 
Western 
Penstemon 
Penstemonopsis 
Pepnergrass 
Peppermint 
Peramium 
Peritonum 
Petasites 
Peucedanum 
Phaeca 
Phacelia 
Family 
Phalaris 
Phantor orchid 
Phegopteris 
Phelipaea 
Phleun 
Phlox 
False 
Family 
Phragmites 
Phyllodoce 
Phymosia 
Physaria 
Physocarpus 
Physostegia 
= 
