Purple roll-leaf 91 Q Quailplant 88 Queen-of-the-night 10 Quelite-salado 108 R Rabbit-thorn 78 Rafinesquia 14 Rainbow cactus 98 Rattleweed 57, 86 Rayless-goldenrod 55 RED flowers 65-66 References 109 Reina-de-la-noche 10 Rivercane 24 Rosinbush 25 Rumex 103 Russian thistle 65 S Sacahuiste 21 Sacred datura 11 Sage 100 Sagebrush 5 Saguaro 5, 6, 9, 61 Saltcedar 71 Salvia 100 Sandverbena 96 Scorpionweed 77 Screwbean 48, 49 Screw-pod mesquite 48 Seepweed 108 Seepwillow 17, 25 Sego-lily 62 Senita 74 Seniza 79 Simaruba family 106 Simmondsia 104 Skeletonweed 70 Slimwood 66 Smoketree 102 Soapweed 19, 22 Soaptree Yucca 22