Ptilidium ciliare
Ciliated Fringewort
Ptisana fraxinea
Pitted Potato Fern
Pulsatilla alpina
Alpine Pasque#Flower
Pulsatilla pratensis
Small Pasque#Flower
Pyrola minor
Common Wintergreen
Pyrola rotundifolia
Round-leaved Wintergreen
Pyrrosia piloselloides
Dragon Scale Fern
Pyrus communis
Pear
Pyrus cordata
Plymouth Pear
Radermachera yunnanensis
Ramalina fastigiata
Raphanus raphanistrum
Wild Radish
Rhamnus cathartica
Buckthorn
Rhinanthus alectorolophus
European Yellow-rattle
Rhodiola rosea
Roseroot
Ricinus communis
Castor-oil-plant
Rivini humilis
Bloodberry
Rosa arvensis
Field-rose
Rosa rubiginosa
Sweet-briar
Rubia peregrina
Wild Madder
Rubus fraxinifolius
Mountain Raspberry
Ruella simplex
Mexican Petunia
Ruellia tuberosa
Minnieroot
Rumex confertus
Russian Dock