Redflower Cactus Redflower Cactus: lindheimeri
Red-Hot Cat's Tail Red-stemmed Lady's Mantle
Red-White-and-Blue Flower (spp.) Reed Grass
Reed Grass: foliosa Reed, Broom
Reed, Bur Reed, Egyptian Paper (spp.)
Reed, Egyptian Paper 'King TutŪ' 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 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
'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