Regal Geranium 'Aztec' Regal Geranium 'Ballerina'
Regal Geranium 'Delilah' Regal Geranium 'Flair'
Regal Geranium 'Martha Washington' 'Regal' Hybrid Elm
Regal Lily 'Regal Red' Crapemyrtle: indica
'Regal Red' Japanese Silver Painted Fern 'Regal Rhubarb' Hosta
'Regal Robe' Alumroot: Heuchera 'Regal Splendor' Hosta
'Regent' Japanese Pagoda Tree 'Regent' Saskatoon Serviceberry
'Regina' Alumroot: Heuchera 'Regulus' Bigleaf Hydrangea
Rehmannia 'Rein's Dense Jade' Japanese Cedar
'Reis Dwarf' Hinoki False Cypress Reitz's Aloe
'Remontii' Norway Spruce 'Renaissance' Vanhoutte Spirea
Renard Geranium Renard's Cranesbill
'Renick' Carpet Bugle 'Repanda' Shore Juniper
'Repandens' English Yew 'Repandens' Japanese Holly
'Rependens' Colorado Red Cedar 'Repens' Colorado Red Cedar
'Repens' Norway Spruce 'Repens' Willowleaf Cotoneaster
'Resina' Pot Marigold Restio, Horsetail
Resurrection Fern Resurrection Fern: polypodiodes
Resurrection Lily: rotunda Resurrection Lily: squamigera
'Reuben' Pineapple Lily 'Rev. John G. Drayton' Japanese Camellia
'Revolution Green' Paperbark '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
'Rheingold' American Arborvitae Rhemannia
Rheumatism Root Rhodendron, Pacific
Rhododendron 'King George' Rhododendron, Carolina
Rhododendron, Catawba (spp.) Rhododendron, Catawba 'Boursault'
Rhododendron, Catawba White Rhododendron, Cloudland
Rhododendron, Dahurian Rhododendron, Daurian
Rhododendron, Great (spp.) Rhododendron, Great White
Rhododendron, Great 'Golden Lights' Rhododendron, Great 'Great Laurel'
Rhododendron, Great 'Mandrin Lights' Rhododendron, Piedmont
Rhododendron, Rosebay (spp.) Rhododendron, Rosebay 'Golden Lights'
Rhododendron, Rosebay 'Great Laurel' Rhododendron, Rosebay 'Mandrin Lights'
Rhododendron: (n) 'Amy Cotta' Rhododendron: (n) 'PJM Elite'
Rhododendron: aberconwayi Rhododendron: aureum
Rhododendron: auriculatum Rhododendron: bureavii
Rhododendron: bureavii taliensia Rhododendron: calophytum
Rhododendron: carneum Rhododendron: cinnabarinum
Rhododendron: dendricola Rhododendron: fulvum
Rhododendron: grande grandia Rhododendron: horlickianum
Rhododendron: hybrid 'Else Frye' Rhododendron: hybrid 'Genevieve Schmidt'
Rhododendron: hybrid 'Gills Triumph' Rhododendron: hybrid 'Lemon Mist'
Rhododendron: hybrid 'Looderi King George' Rhododendron: hybrid 'Mrs. G.W. Leak'
Rhododendron: hybrid 'NE Plus Ultra' Rhododendron: hybrid 'Northern Starburst'
Rhododendron: hybrid 'Noyo Chief' Rhododendron: hybrid 'Painted Lady'
Rhododendron: hybrid 'Peach Blow' Rhododendron: hybrid 'Rose Mangles'
Rhododendron: hybrid 'Rubicon' Rhododendron: hybrid 'Sir Charles Lemon'
Rhododendron: hybrid 'Tsuta-momiji' Rhododendron: hybrid 'Wards Beauty'
Rhododendron: hyperythrum Rhododendron: iteophyllum
Rhododendron: macgregoriae Rhododendron: micranthum
Rhododendron: minus Rhododendron: montroseanum
Rhododendron: protistum grandia Rhododendron: roxieanum
Rhododendron: rubiginosum Rhododendron: scabrifolium spiciferum
Rhododendron: strigillosum Rhodoleia
Rhodophiala 'Rhodotera' Milkwort
Rhodotypos (spp.) Rhodotypos 'Black Jet Bead'