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
Sageleaf Rockrose
Sago Palm
Saltillo Evening Primrose
Sand Sage
Sansanqua or Sun Camellia
Scarlet Bugler
Scarlet Larkspur, Red Delphinium
Screw Bean Mesquite, Tornillo
Sea Pink, Common Thrift
Semi-trailing Yellow Gazania
Semi-Trailing Yellow Gazania
Shamel Ash, Mexican Evergreen Ash