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Opuntia — continued, 



riparia, 149 



robusta, 182, 191, 192 



robusta viridior, 191 



rosea, 17, 63, 65, 78 



roseana, 130 



rosiflora, 78 



rotundifolia, 27 



roxburghiana, 156 

 ]' . rubesccns, 163, 202, 208, 209 



rubiflora, 133, 146 



ruBrifoIia, 144 



rufescens, 175 



rufida, 118, 119, 122 



rugosa, 145 



rtissellii, 90, 94 



ruthei, 64 



rutila, 196 



sabinii^ 194 



sacharosa, 14, 



salicornioides, 215 



salmiana, 73 74 



salmii, 214 



sanguinocula, 131 



santa-rita, 140, 142 



scheeri, 159, 176 



schickendantzii, 74, 107 



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schomburgkii, 214 

 scliottii, 79, 80, 81 

 schottii greggii, 80 

 schumannii, 90, 149, 155 

 schweriniana, 199, 



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semispinosa, 147 

 senilis^ 86/159, 176 

 sericea, 134 

 sericea coerulea, 134 

 ^ sericea longispina, 134 

 sericea maelenii, 134 

 serpentina, 56, 57, 58, 69, 81 

 setispma, 45, 137, 138 



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shreveana, 142 

 sinclairii, 165, 166 

 stottsbergii, 90, 96, 97 



soederstxomiana, 149, 154, 221 

 sochrensii, 133, 134, 135 

 sp'athulata, 28, 29 - 



spathulata aquosa, 30 . ; ^ 



speciosa, 214 

 spegazzinii, 73, 74 

 sphaerica, 90, 96 ' 

 sphaerocarpa, 193, 198, 199 

 sphaerocarpa utahensis, 199 

 spinalba, 130 

 spinaiirea, 214 

 spiniflora, 215 

 spinosior, 52, 67, 68 

 spinosior neomexicana, 68 

 spinosissima, 103, 175, 202, 204, 205 

 spinotecta, 64 



spinulifera, 178, 181, 182 

 spinuliflora, 214 ' 



spinulosa, 214 

 splendens, 199 

 squarrosa, 165 

 stanlyi, 79, 80 



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Opuntia — continued. 



stapelia, 66 

 stapeliae, 65, 66 

 stellata, 64 

 stenarthra, 158 

 stenochila, 126, 132 

 stenopetala, 200, 201 

 straminea, 214 

 streptacantha, 181, 184, 185 

 stricta, 159, 161, 178, 223 

 stricta spinulescens, 214 

 strigil, 136 

 subarmata, 165, 166 

 subferox, 175 

 subinennis, 214 

 subterranea, 90, 92 



subulata, 71. 75. 76, 77. 79 

 sulphufea, 133, 134, 150 



sulphurea laevior, 134 



sulphurea major, 134 



I sulphurea minor, 134 



sulphurea pallidior, 134 



superbospina, 144 



syringacantha, 89 



tapona, 124, 160, 164 



tarapacana, 90, 94 



tardospina, 140, 141 

 taylori, 102, 103 

 tenajo, 49 



tenuispina, 137, 139 

 teres, 71 



tesajo, 47, 48, 49 

 tessellata, 46 

 tessellata cristata, 46 

 testudinis-crus, 206 



tetracantha, 52, 53» 54 

 texana, 165, 166 

 thurberi, 52, 53, 54 

 tidballii, 160 

 tomentella, 173, 174 

 tomentosa, 173, 174 

 tortisperma, 131, 132 



tortispina, 126, 128, 131, 194 

 toumeyi, 144 



tracyi, 102, 105 

 treleasei, 118, 119 

 treleasei kernii, 119 

 triacantha, no, 112, 113, 115 

 tribuloides, 186 

 tricolor, 165, 166 



trichophora, 193, 195 

 tuberculata, 214 

 tuberiformis, 92 

 tuberosa, 32, 2>3 

 tuberosa spinosa, 89 

 tuna, no, 113, 114, 116, 149, 

 tuna humilis, 114 

 tuna laevior, 114 

 tuna orbiculata, 114 

 tunicata, 60, 65, 66, 83, 121 

 tunicata laevior, 66 

 tunoidea, 116, 162 

 tunoides, u6 

 turpinii, 89 



turpinii polymorpha, 89 

 tweediei, 134 



imibrella, 156 

 undosa, 177, 179 



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