Plant Common Names Starting With ‘R’
- Rabbit Thorn
- Ragged Jatropha
- Ragged Nettlespurge
- Ragged Rockflower
- Ragweed, Ambrosia Leaf Bur
- Ragweed, Canyon
- Ragweed, Slender
- Ragweed, Triangle Bur
- Ragweed, Tucson Bur
- Ragweed, Weakleaf Bur
- Ragwort, Lemmon's
- Ragwort, Mono
- Rainbow Cactus
- Rainbow Hedgehog Cactus
- Ram's Horn
- Rancher's Fireweed
- Range Ratany
- Ratany, Littleleaf
- Ratany, Pima
- Ratany, Range
- Ratany, White
- Ratear Coldenia
- Rattlebox, Low
- Rattlesnake-weed
- Rattlesnakeweed
- Rayless Encelia
- Red Cinquefoil
- Red Dome Blanket Flower
- Red Dome Blanketflower
- Red Maids
- Red Monkeyflower
- Red Spiderling
- Red-whisker Clammyweed
- Redmaids, Fringed
- Redspike Mexican Hat
- Redstem Filaree
- Redstem Monkey-flower
- Redstem Stork's Bill
- Redtop, Natal
- Redwhisker Clammyweed
- Reed, Giant
- Rhubarb, Desert
- Rhubarb, Wild
- Rhus, Willow
- Ribbed Melilot
- Ribbon Four O'Clock
- Richardson Geranium
- Richardson's Geranium
- Rio Grande Saddlebush
- Rock Cress, Stiffarm
- Rock Hibiscus
- Rock Mustard
- Rockcress, Perennial
- Rocket Mustard
- Rocketmustard
- Rockflower, Ragged
- Rockmustard
- Rockpea, Desert
- Rockpurslane, Desert
- Rocktrumpet, Huachuca Mountain
- Rocky Mountain Beardtongue
- Rocky Mountain Penstemon
- Rocky Mountain Zinnia
- Rosary Baby-bonnets
- Rosary Babybonnets
- Rose Bladderpod
- Rose Evening Primrose
- Rose Natal Grass
- Rose Natalgrass
- Rose, Common Wild
- Rose, Mountain
- Rose, Western Wild
- Rose, Wood's
- Rose, Woods'
- Rosemallow, Desert
- Rosewood, Arizona
- Rosinbush
- Rosy Desert Beardtongue
- Rosy Evening-primrose
- Rouge Plant
- Rougeplant
- Rough Cocklebur
- Rough Horsetail
- Rough Menodora
- Rough Sow-thistle
- Roughseed Clammyweed
- Roving Sailor
- Ruellia
- Rush-Pea, Indian
- Rushpea, Indian
- Russian Thistle, Prickly
- Russianthistle, Common
