Pyrola minor
Common Wintergreen
Pyrola rotundifolia
Round-leaved Wintergreen
Pyrus communis
Pear
Pyrus cordata
Plymouth Pear
Quercus petraea
Sessile Oak
Quercus rubra
Red Oak
Ranunculus acris
Meadow Buttercup
Ranunculus aquatilis
Common Water-crowfoot
Ranunculus auricomus
Goldilocks Buttercup
Ranunculus bulbosus
Bulbous Buttercup
Ranunculus peltatus
Pond Water-crowfoot
Ranunculus repens
Creeping Buttercup
Ranunculus sardous
Hairy Buttercup
Ranunculus sceleratus
Celery-leaved Buttercup
Raphanus raphanistrum
Radish
Raphanus sativus
Garden Radish
Reseda lutea
Wild Mignonette
Reseda luteola
Weld
Reynoutria japonica
Japanese Knotweed
Rhinanthus angustifolius
Greater Yellow-rattle
Rhinanthus minor
Yellow-rattle
Rhodiola rosea
Roseroot
Rhododendron loderi
Rhynchospora alba
White Beak-sedge