Rabbit-tobacco
Rabbitfoot Clover
Rabbitsfoot Grass
Racemed Dewberry
Racemed Milkwort
Radish
Ragged Robin
Ragweed
Ragwort
Ramp
Rampion Bellflower
Rampion Mignonette
Ramtilla
Rannoch-rush
Rare Clubmoss
Rattlebox
Rattlesnake Brome
Rattlesnake Fern
Rattlesnake Mannagrass
Rattlesnake Plantain
Rattlesnakemaster
Rattlesnakeroot
Rattlesnakeweed
Rayless Alkali Aster
Recurved Blackberry
Red Amaranth
Red Baneberry
Red Catchfly
Red Chokeberry
Red Clover
Red Columbine
Red Currant
Red Elderberry
Red Fescue
Red Goosefoot
Red Haw
Red Hempnettle
Red Hickory
Red Maple
Red Milkweed
Red Monkswort
Red Mulberry
Red Pine
Red Sandspurry
