'Rosi Klose' Bergenia Rosilla
Rosinweed: perfoliatum 'Rosish One' Carnation: Dianthus
Rosularia 'Rosylva' Forget-me-not
'Rotblum' Heartleaf Bergenia 'Rote Glocke' Pasque Flower
'Rothschildiana' Glory Lily 'Rotstrahlbusch' Switch Grass
'Rotundatum Cristatum' English Hedge Fern Rough Bluegrass
Rough Horsetail Rough Seeded California Poppy
Rough-Leaved Goldenrod 'Fireworks' Rough-Stalk Bluegrass
Roughstem Goldenrod 'Fireworks' Round Head Bush Clover
Round Headed Leek Round Leaf Navel Wort
Round Lobed Hepatica Roundleaf Greenbrier
Roundleaf Oregano Royal Agave
'Royal Aspirations' English Larkspur 'Royal Burgundy' Bromeliad: hybrid
Royal Fern (spp.) Royal Fern 'Purpurescens'
Royal Fern: regalis spectabilis Royal Purple Autumn Sage
'Royal Purple' Lilyturf 'Royal Robe' Germander
'Royal Robe' Wood Sage 'Royal Standard' Common Torch Lily: Kniphofia
'Royal Standard' Hosta 'Royal Wedding' Oriental Poppy
'Rozanne' Hybrid Geranium Rubber Euphorbia 'Red Pencil Tree'
Rubber Plant, Baby (spp.) Rubber Plant, Baby Variegated
Rubber Plant, Japanese Variegated 'Rubiginosa' Joseph's Coat: dentata
'Rubra' Cut-leaf Anemone 'Rubra Flora Plena' Fernleaf Peony
'Rubra' Fringecup 'Rubra' Japanese Blood Grass
'Rubra' Pussytoes 'Rubra' Windflower
'Rubrifolia' Plantain: major 'Rubrum' Alpine Epimedium
'Rubrum' Fennel 'Rubrum' Fountain Grass: setaceum
'Rubrum' Oriental Lily 'Rubrum' Trillium
'Ruby Cluster' Everlasting 'Ruby Gardner' Sacred Lotus
'Ruby Glow' Star Cluster 'Ruby' Joseph's Coat: dentata
'Ruby Meyer' Amaryllis: Hippeastrum 'Ruby Moon' Hyacinth Bean
'Ruby Star' Purple Coneflower 'Ruby Throat' Daylily
'Ruby Veil' Rock Geranium 'Rudolph Roehrs' Spotted Dumbcane
Rue Anemone (spp.) Rue Anemone, False
Rue, Garden (spp.) Ruellia, Baja
Ruellia, Desert Ruellia, Red (spp.)
Ruellia, Red 'Ragin Cajin' Ruellia, Violet
'Ruffled Apricot' Daylily 'Ruffled Ruby' Daylily
'Ruffles' Alumroot: micrantha Runaway Robin (spp.)
Runaway Robin Variegated 'Running Tapestry' Heartleaf Foamflower
Rupturewort Ruscus
Rush Milkweed Rush, Common 'Gold Strike'
Rush, Elegant Rush, Scouring
Rush, Soft 'Gold Strike' 'Russell Hybrid' Lupine
'Russell Manning' Argentine Rain Lily Russian Comfrey 'Axminster Gold'
Russian Comfrey Variegated Russian Sage (spp.)
Russian Sage 'Blue Spire' Russian Sage 'Filagran'
Russian Sage 'Little Spire' Russian Sage 'Longin'
Rusty Foxglove 'Yellow Herald' Rusty Sage
Rusty Woodsia Fern Rye, Giant Wild (spp.)
Rye, Giant Wild 'Canyon Prince'