| Add to Export List | Image | Common Name | Scientific Name | Cultivar/Variety | Plant Type |
|---|---|---|---|---|---|
| Add To List Remove From List | Rhone Aster | Aster sedifolius | 'Nanus' | Hardy perennial | |
| Add To List Remove From List | Ricki Magnolia | Magnolia | 'Ricki' | Deciduous tree | |
| Add To List Remove From List | Rieger Begonia | Begonia xhiemalis | Annual | ||
| Add To List Remove From List | River Birch | Betula nigra | Deciduous tree | ||
| Add To List Remove From List | Robert Frost Hosta | Hosta | 'Robert Frost' | Hardy perennial | |
| Add To List Remove From List | Robert Poore Phlox | Phlox paniculata | 'Robert Poore' | Hardy perennial | |
| Add To List Remove From List | Robinson hybrid painted daisy | Tanacetum coccineum | 'Robinson Hybrids' | Hardy perennial | |
| Add To List Remove From List | Robinson's Red Painted Daisy | Tanacetum coccineum | 'Robinson' | Hardy perennial | |
| Add To List Remove From List | Robinson's Rose Painted Daisy | Tanacetum coccineum | 'Robinson' | Hardy perennial | |
| Add To List Remove From List | Robust Anemone | Anemone tomentosa | 'Robustissima' | Hardy perennial | |
| Add To List Remove From List | Robusta Poplar | Populus x | 'Robusta' | Deciduous tree | |
| Add To List Remove From List | Robusta Rose | Rosa | 'KORgosa' | Deciduous shrub | |
| Add To List Remove From List | Rocket Candytuft | Iberis amara | Annual | ||
| Add To List Remove From List | Rocky Top Coneflower | Echinacea tennesseenis | 'Rocky Top' | Hardy perennial | |
| Add To List Remove From List | Rodger's Flower | Rodgersia aesculifolia | Hardy perennial | ||
| Add To List Remove From List | Roman chamomile | Chamaemelum nobile | Herb, Hardy perennial | ||
| Add To List Remove From List | Rosalinde Meadow Phlox | Phlox maculata | 'Rosalinde' | Hardy perennial | |
| Add To List Remove From List | Rose Campion | Lychnis coronaria | Hardy perennial | ||
| Add To List Remove From List | Rose Dawn cheddar pink | Dianthus gratianopolitanus | 'Rose Dawn' | Hardy perennial | |
| Add To List Remove From List | Rose Elf Beard-tongue | Penstemon barbatus | 'Rose Elf' | Hardy perennial | |
| Add To List Remove From List | Rose Mallow | Hibiscus moscheutos | Hardy perennial | ||
| Add To List Remove From List | Rosea Clethra | Clethra alnifolia | 'Rosea' | Deciduous shrub | |
| Add To List Remove From List | Rosea Evening Primrose | Oenothera speciosa | 'Rosea' | Tender perennial | |
| Add To List Remove From List | Rosemary | Rosmarinus officinalis | Annual | ||
| Add To List Remove From List | Rosy Glow Sedum | Sedum | 'Rosy Glow' | Hardy perennial | |
| Add To List Remove From List | Rosy Lights Azalea | Rhododendron | 'Rosy Lights' | Deciduous shrub | |
| Add To List Remove From List | Rosy Returns Daylily | Hemerocallis | 'Rosy Returns' | Hardy perennial | |
| Add To List Remove From List | Rotstralbusch Red Switch Grass | Panicum virgatum | 'Rotstralbusch' | Hardy perennial, Ornamental grass | |
| Add To List Remove From List | Rouge Cardinal Clematis | Clematis | 'Rouge Cardinal' | Vine | |
| Add To List Remove From List | Rough Blazingstar | Liatris aspera | Hardy perennial, Wildflower | ||
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