Red Flax
Red Horsechestnut
Red Push Ornamental Pistache
Red Yucca
Red-Leaf or Fraser Photinia
Rock Penstemon
Rocky Mountain Penstemon
Roger's Red Wild Grape
Rose Glow Barberry
Rose Of Sharon, Shrub Althaea
Rosea Yarrow
Rosemary
Rosemary Collingwood Ingram
Rosemary Tuscan Blue
Rough-Leafed Agave
Royal Burgundy Barberry
Royal Purple Sage
Royal Trumpet Vine, River's Trumpet
Ruby Flower Red Horsechestnut
Sacahuista, The Devil's Shoestring