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Rattlesnake-Master: Eryngium yuccifolium Red Baneberry: Actaea rubrua Red Buckwheat: Eriogonum grande Red Calla: Zantedeschia rehmannii Red Flowering Tobacco: Nicotiana x sanderae Red Ginger: Alpinia purpurata Red Ginger Lily: Hedychium coccineum Red Hot Poker: Kniphofia uvaria Red Puccoon: Sanguinaria canadensis Red Root: Wachendorfia thyrisiflora Red Valerian: Centranthus ruber Redwood Ivy: Vancouveria planiperala Red Yucca: Hesperaloe parviflora Regal Pelargonium: Pelargonium x domesticum Renga Lily: Arthropodium cirrhatum Rest Harrow: Ononis rotundifolia Rhubarb: Rheum Rockcress: Arabis Rock Soapwort: Saponaria ocymoides Rocky Mountain Columbine: Aquilegia caerulea Rogue's Gilliflower: Hesperis matronalis Roman Candle: Yucca gloriosa Romero: Trichostema lanatum Rose Campion: Lychis coronaria Rose Mallow: Hibiscus Rose Periwinkle: Catharanthus roseus Roseroot: Sedum rosea Rose-Scented Geranium: Pelargonium graveolens Rose-Scented Perargonium: Pelargonium capitatum Rose Verbena: Verbena cnaadensis Rosinweed: Silphium Rough Gentian: Gentiana scabra Roundleaf Violet: Viola rotundifolia Rover Bellflower: Campanula rapunculoides Ruby Cinquefoil: Potenilla atrosanguineum Russian Comfrey: Symphytum x uplandicum Russian Sage: Perovskia atriplicifolia Rusty Foxglove: Digitalis ferruginea

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