'Redbor' Flowering Kale Redflower Cactus
Redflower Cactus: lindheimeri Redroot: retroflexus
Red-stemmed Lady's Mantle Red-White-and-Blue Flower (spp.)
Reed Grass Reed Grass: foliosa
Reed, Albertina Thatching Reed, Broom
Reed, Bur Reed, Egyptian Paper (spp.)
Reed, Egyptian Paper 'King TutŪ' Reed, Thatching
'Reflections Purple' Garden Petunia Reflexed Stonecrop 'Angelina'
Reflexed Stonecrop 'Blue Spruce' Regal Geranium 'Aztec'
Regal Geranium 'Ballerina' Regal Geranium 'Delilah'
Regal Geranium 'Flair' Regal Geranium 'Martha Washington'
Regal Lily 'Regal Red' Japanese Silver Painted Fern
'Regal Rhubarb' Hosta 'Regal Robe' Alumroot: Heuchera
'Regal Splendor' Hosta 'Regina' Alumroot: Heuchera
Rehmannia Reitz's Aloe
Renard Geranium Renard's Cranesbill
'Renick' Carpet Bugle 'Resina' Pot Marigold
Restio, Horsetail Resurrection Fern
Resurrection Fern: polypodiodes Resurrection Lily: rotunda
Resurrection Lily: squamigera 'Reuben' Pineapple Lily
'Revolution' Hosta Rex Begonia (spp.)
Rex Begonia Vine Rex Begonia 'Dew Drop'
Rex Begonia 'Fire Blush' Rex Begonia 'Hilo Holiday'
'Rhapsody in Green' Chinese Evergreen Rhemannia
Rheumatism Root Rhodophiala
Rhubarb Rhubarb, Giant
'Rhythm 'n' Blues' Dwarf Blue Corydalis Ribbon Plant (spp.)
Ribbon Plant Variegated Rice Gasteria
'Rich and Famous' Louisiana Iris 'Richland Gold' Hosta
'Richmond' Florist's Chrysanthemum 'Riegel's Big Blue' Lilyturf
Rieger Begonia (spp.) Rieger Begonia 'Betulia Red'
'Right On' Daylily Rigid Twinspur
Rigidella 'Rigoletto' Dahlia
'Ring of Fire' Alumroot: Heuchera 'Ring of Fire' Common Sunflower
'Ringlets' Daylily Rio Grande Copper Lily
'Rio' Zonal Geranium 'Ritz Rocket' Amaranth: hybrid
'Rivendell' Florist's Chrysanthemum 'River Hawk' Tall Bearded German Iris
River Oats 'Rivereorum' Chinese Goddess Bamboo
Robb's Spurge 'Robella' English Daisy
'Robert Frost' Hosta 'Robert' Purple Loosestrife
'Robin (Songbird Series)(n)' Columbine 'Robinson Hybrids' Painted Daisy
'Robinson's Mix' Painted Daisy 'Robinson's Red' Painted Daisy
'Robusta' Hedge Nettle 'Robusta' Hosta: fortunei
'Robusta' Woundwort 'Robustissima' Hardy Grape Leaf Anemone