Plants by A-Z (R)

Radicchio (Italian Chicory, Escarole)
Chicorum intybus

Radish
Raphanus sativus

Ragged Robin
Lychnis flos-cuculi

Ragweed (Common Ragweed, American Wormwood, Bitterweed, Bloodweed)
Ambrosia spp.

Ragwort (Oxford Ragwort, Tansy Ragwort, Stinking Willie)
Senecio spp; esp. Senecio jacobaea, Senecio squalidi, syn. Jacobaea vulgaris

Raspberry
Rubus spp., esp. Rubus idaeus

Rayless Goldenrod (Jimmyweed, Jimmy Weed, Southern Goldenbush)
Isocoma pluriflora (syn. Haplopappus heterophyllus; syn. Haplopappus pleuriflorus; syn. Icocoma wrightii)

Red Bartsia (Bartsia)
Odontites vernus

Red Bistort (Mountain Fleece)
Persicaria amplexicaulis

Red Currant (Redcurrant)
Ribes rubrum

Red Hot Poker
Kniphofia

Red Leaf Lettuce (Lollo Rosso)
Lactuca sativa

Red Maple
Acer rubrum

Red Pitaya (Dragonfruit, Hylocereus)
Hylocereus spp.

Red Valerian (Jupiter's Beard, Spur Valerian, Kiss Me Quick)
Centranthus ruber; Centranthus ruber 'albus'

Rest Harrow (Restharrow, Spiny Rest Harrow, Shrubby Rest Harrow)
Ononis spp

Rhipsalis (Mistletoe Cactus)
Rhipsalis spp.

Rhododendron
Rhododendron spp.

Rhubarb
Rheum spp.

Rock Cress (Rockcress, Arabis)
Arabis spp.

Rock Rose (Sun Rose)
Helianthemum nummularium

Rocket (Arugula, Rucola, Salad Rocket)
Eruca sativa, Eruca vesicaria

Romaine Lettuce (Garden Lettuce, Cos Lettuce).
Lactuca sativa

Rose
Rosa spp.

Rosebay Willowherb (Rosebay Willow Herb, Great Willowherb, Fireweed)
Chamaenerion angustifolium

Rosemary
Rosmarinus officinalis

Roundleaf Cranesbill Geranium (Round-leaved Crane's-bill, Round leaf Geranium)
Geranium rotundifolium

Rue (Common Rue, Herb of Grace)
Ruta spp., esp. Ruta graveolens

Russian Sage
Perovskia atriplicifolia

Russian Vine (Mile-a-Minute, Mile a Minute)
Fallopia baldschuanica (Polygonia baldschuanica)