246 



THE CACTACEAE. 



Echinocactus continued. 

 netrelianus, 154 

 neumannianus, 100 

 neumannianus rigidior, 100 

 nidus, 94, 207 

 niger, 96 



nigricans, 95, 96, 176 

 nigrispinus, 190, 191 

 nobilis, 158 

 nodosus, 77, 105 

 nummularioides, 203 

 obrepandus, 73 

 obvallatus, 115, 116, 119 

 obvallatus pluricostatus, 115 

 obvallatus spinosior, 115 

 occultus, 95 

 ochroleucus, 122 

 octacanthus, 122 

 octogonus, 64 

 odierianus, 177 

 odieri, 177 



odieri magnificus, 178 

 odieri mebbesii, 178 

 odieri spinis nigris, 178 

 olaeogonus, 180 

 oligacanthus, 121, 170 

 orcuttii, 134, 135 

 oreptilis, 180 

 ornatus, 185 

 ornatus glabrescens, 185 

 ornatus mirbelii, 185 

 orthacanthus, 138 

 ottonis, 142, 195, 196 

 ottonis brasiliensis, 196 

 ottonis minor, 196 

 ottonis pallidior, 195 

 ottonis paraguayensis, 196 

 ottonis pfeifferi, 196 

 ottonis spinosior, 195 

 ottonis tenuispinus, 195, 196 

 ottonis tortuosus, 195 

 ottonis uruguayus, 196 

 ourselianus, 159 

 ourselianus albispinus, 159 

 oxy acanthus, 180 

 oxygonus, 64, 65 

 oxypterus, 138 

 pachycentrus, 203, 204 

 pachycornis, 178 

 palmeri, 167, 172 

 pampeanus, 200, 201 

 pampeanus charruanus, 200 

 pampeanus rubellianus, 200 

 pampeanus subplanus, 200 

 papyracanthus, 91, 92 

 paraguayensis, 156 

 parryi, 175 

 parvispinus, 237 

 pauciareolatus, 188, 189 

 pectinatus, 29 

 pectiniferus, 29, 30 

 pectiniferus laevior, 29 

 pelachicus, 180 

 peninsulae, 133, 134 

 pentacanthus, 115, 116 

 pentlandii, 49, 54, 55 

 pepinianus, 100 

 pepinianus affinis, 89 



Echinocactus continued. 

 peruvianus, 102 

 pfeifferi, 137, 138 

 pfersdorfhi, 138 

 phoeniceus inermis, 14 

 phyllacanthoides, 118 

 phyllacanthus, 1 1 8 

 phyllacanthus laevior, 118 

 phyllacanthus laevis, 118 

 phyllacanthus macracanthus, 1 18 

 phyllacanthus micracanthus, 118 

 phyllacanthus pentacanthus, 118 

 phyllacanthus tenuiflorus, 1 1 8 

 phyllacanthus tricuspidatus, 117, 118 

 piliferus, 125 



pilosus, 124, 125, 126, 147 

 pilosus pringlei, 125 

 pilosus steinesii, 124 

 pilosus steinsii, 124 

 plaeentiformis, 219 

 platensis, 163, 164 

 platensis leptanthus, 163, 164 

 platensis parvulus, 163 

 platensis quehlianus, 163 

 platensis typicus, 163 

 platyacanthus, 166, 167, 171 

 platycarpus, 180 

 platycephalus, 181 

 platyceras, 169 

 platyceras laevior, 169 

 platyceras minax, 169 

 plicatilis, 180 

 pluricostatus, 180 

 poliacanthus, 198 

 polyacanthus, 167 

 polyancistrus, 167, 212, 213, 214 

 polycephalus, 167, 174 

 polycephalus flavispinus, 174 

 polycephalus xerauthemoides, 173 

 polyocentrus, 138 

 polygraphis, 103 

 polyraphis, 103 

 polyrhaphis, 103 

 pringlei, 125, 126 

 pseudo-cereus, 98 

 pseudominsueulus, 47 

 pubispinus, 213 

 pulehellus, 33 

 pulcherrimus, 194 

 pulverulentus, 178 

 pumilus, 209, 210 

 pumilus graeillimus, 209 

 punctulatus, 180 

 pycnoxyphus, 139 

 pygmaeus, 210, 211 

 pygmaeus phaeodiscus, 210 

 pyramidatus, 90 

 quadrinatus, 122 

 quehlianus, 163, 164 

 rafaelensis, 147 

 raphidacanthus, 122 

 raphidocentrus, 122 

 rebutii, 180 

 rectispinus, 134 

 recurvus, 141, 142, 143 

 recurvus bicolor, 143 

 recurvus latispinus, 143 

 recurvus solenacanthus, 143 



