Rabbit-tobacco
Rabbitbells
Rabbitfoot Clover
Rabbitsfoot Grass
Racemed Milkwort
Radish
Ragged Robin
Ragweed
Ragwort
Ramp
Rampion Bellflower
Rape
Rare Clubmoss
Rattlebox
Rattlesnake Fern
Rattlesnake Mannagrass
Rattlesnake Plantain
Rattlesnakemaster
Rattlesnakeroot
Rattlesnakeweed
Rattleweed
Ravenfoot Sedge
Ravine Sedge
Rayless Goldenrod
Reclining Bulrush
Red Amaranth
Red Buckeye
Red Chokeberry
Red Clover
Red Columbine
Red Elderberry
Red Fescue
Red Hawthorn
Red Hickory
Red Lovegrass
Red Mangrove
Red Maple
Red Milkweed
Red Mulberry
Red Pine
Red River Scaleseed
Red Spiderling
Red Spruce
Red Trillium
