| Add to Export List | Image | Common Name | Scientific Name | Cultivar/Variety | Plant Type |
|---|---|---|---|---|---|
| Add To List Remove From List | Royal Heritage Lenten Rose | Helleborus | 'Royal Heritage' | Hardy perennial | |
| Add To List Remove From List | Royal Purple Smokebush | Cotinus coggygria | 'Royal Purple' | Deciduous shrub | |
| Add To List Remove From List | Royal Raindrops Crabapple | Malus | Deciduous tree | ||
| Add To List Remove From List | Royal Standard Hosta | Hosta | 'Royal Standard' | Hardy perennial | |
| Add To List Remove From List | Royal Star Magnolia | Magnolia stellata | 'Royal Star' | Deciduous tree | |
| Add To List Remove From List | Royal Velours Clematis | Clematis viticella | 'Royal Velours' | Vine | |
| Add To List Remove From List | Royalty Crabapple | Malus | 'Royalty' | Deciduous tree | |
| Add To List Remove From List | Royalty Lilac | Syringa xjosiflexa | 'Royalty' | Deciduous shrub | |
| Add To List Remove From List | Rozanne Geranium | Geranium | 'Rozanne' | Ground cover, Hardy perennial | |
| Add To List Remove From List | Rubra Pasque Flower | Pulsatilla vulgaris | 'Rubra' | Hardy perennial | |
| Add To List Remove From List | Rubra Spicata Norway Spruce | Picea abies | 'Rubra Spicata' | Evergreen tree | |
| Add To List Remove From List | Rubra Spiderwort | Tradescantia x andersoniana | 'Rubra' | Hardy perennial | |
| Add To List Remove From List | Ruby Glow Clematis | Clematis | 'Ruby Glow' | Vine | |
| Add To List Remove From List | Ruby Grass | Melinus nerviglumnis | 'Pink Crystals' | Annual | |
| Add To List Remove From List | Ruby Mist Coral Bells | Heuchera | 'Ruby Mist' | Hardy perennial | |
| Add To List Remove From List | Ruby Spice Summersweet | Clethra alnifolia | 'Ruby Spice' | Deciduous shrub | |
| Add To List Remove From List | Ruby Star Coneflower | Echinacea purpurea | 'Ruby Star' | Hardy perennial | |
| Add To List Remove From List | Ruby Stella Daylily | Hemerocallis | 'Ruby Stella' | Hardy perennial | |
| Add To List Remove From List | Ruby Wedding Masterwort | Astrantia major | 'Ruby Wedding' | Hardy perennial | |
| Add To List Remove From List | Rubyfrost Maple | Acer rubrum | 'Polara' | Deciduous tree | |
| Add To List Remove From List | Rue Anemone | Anemonella thalictroides | Hardy perennial | ||
| Add To List Remove From List | Ruffled Apricot Daylily | Hemerocallis | 'Ruffled Apricot' | Hardy perennial | |
| Add To List Remove From List | Ruffled Velvet Siberian Iris | Iris sibirica | 'Ruffled Velvet' | Hardy perennial | |
| Add To List Remove From List | Rugosa Rose | Rosa rugosa | Deciduous shrub | ||
| Add To List Remove From List | Rumba Weigela | Weigela florida | 'Rumba' | Deciduous shrub | |
| Add To List Remove From List | Running serviceberry | Amelanchier stolonifera | Deciduous shrub | ||
| Add To List Remove From List | Rushmore Arborvitae | Thuja occidentalis | 'Rushmore' | Evergreen shrub | |
| Add To List Remove From List | Russell Hybrid Lupine | Lupinus perennis | Hardy perennial | ||
| Add To List Remove From List | Russian Cypress | Microbiota decussata | Evergreen shrub | ||
| Add To List Remove From List | Russian Hawthorn | Crataegus ambigua | Deciduous tree | ||
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