Echinocactus—continued. 
recurvus spiralis, 142 
recurvus tricuspidatus, 143 
reductus, 158 
reichei, 191 
reichenbachii, 25 
rettigii, 101 
retusus, 180 
rhodacanthus, 78, 79 
rhodacanthus coccineus, 79 
robustus, 135, 136, 147 
robustus monstrosus, 136 
robustus prolifer, 136 
rosaceus, 199 
rostratus, 59, 97, 98 
rotherianus, 206 
rubidus superbissimus, 98 
rubrispinus, 127 
saglionis, 157 
salm-dyckianus, 88 
salmianus, 74, 222 
salmii, 180 
salpingophorus, 72 
saltensis, 53 
saltillensis, 172, 173 
sandillon, 186, 187 
sanjuanensis, 206 
santa-maria, 131 
schickendantzii, 87, 152, 164, 165 
schilinzkyanus, 210 
schilinzkyanus grandiflorus, 210 
schlumbergeri, 158 
schumannianus, 189 
schumannianus longispinus, 189 
schumannianus nigrispinus, I9I 
sclerothrix, 128 
scopa, 122, 193, 194, 202 
scopa albicans, 193 
scopa candidus, 193, 194 
- scopa candidus cristatus, 193, 194 
scopa cristatus, 193, 194 
scopa ruberrimus, 193 
scopa rubrinus, 193 
sellowianus, 188, 189 
sellowianus tetracanthus, 188 
sellowii, 188, 189 
sellowii acutatus, 188 
sellowii courantii, 188 
sellowii macrocanthus, 188, 189 
sellowii macrogonus, 188, 189 
sellowii martinii, 188, 189 
sellowii turbinatus, 188, 189 
sellowii typicus, 188 
senilis, 94 
sessiliflorus, 188, 189 
sessiliflorus pallidus, 188 
sessiliflorus tetracanthus, 188 
" getispinus, 104, 105, 106 
setispinus cachetianus, 104 
setispinus hamatus, 104, 105 
setispinus longihamatus, 144 
setispinus longispinus, 106 
setispinus martelii, 105 
setispinus mierensis, 105 
setispinus muehlenpfordtii, 105 
setispinus orcuttil, 105 
setispinus robustus, 144 
setispinus setaceus, 104, 105 
INDEX. 247 
Echinocactus—continued. 
setispinus sinuatus, 144 
setosus, 77 
sickmannii, 180 
sileri, 215 
simpsonii, 90, 91, 92 
simpsonii minor, 90 
simpsonii robustior, 90, 91 
sinuatus, 144, 146 
soehrensii, 202, 203 
soehrensii albispinus, 203 
soehrensii brevispinus, 203 
soehrensii niger, 203 
solenacanthus, 142 
sparathacanthus, 180 
spectabilis, 136 
spegazzinii, 158, 196 
sphaerocephalus, 114 
spina-christi, 178, 238 
spiniflorus, 58, 78, 178, 179 
spinosior, 213 
spinosissimus, 179 
spinosus, II 
spiralis, 141, 142, 143 
spiralis stellaris, 142 
stainesii, 124, 125, 180 
steinmannii, 47, 48 
stellaris, 142 
stellatus, 142, 152, 163 
stenocarpus, 163 
stenogoni, 118 
stenogonus, I17 
strausianus, 201 
streptocaulon, 86, 87 
stuckertii, 165 
suberinaceus, 188 
subgibbosus, 59, 94, 96, 97, 98 
subglaucus, 213 
subgrandicornis, 181 
submammulosus, 200, 201 
subniger, 100 
subuliferus, 136 
sulcatus, 64 
sulphureus, 123 
supertextus, 100 
tabularis, 193 
tabularis cristatus, 193 
tellii, 123 
tenuiflorus, 118 
tenuispinus, 166, 195, 196 
tenuispinus minor, 195 
tenuispinus ottonis, 196 
tenuissimus, 196 
tephracanthus, 188 
tephracanthus spinosior, 188 
teretispinus, 123 
terscheckii, 199 
tetracanthus, 188, 189 
tetraxiphus, 112 
texensis, 167, 181, 182 
texensis gourgensil, 181 
texensis longispinus, 181 
texensis treculianus, 145 
theiacanthus, 122, 137 
theionacanthus, 122, 137 
thelephorus, 181 
thionanthus, 49, 57 
thrincogonus, 97, 98 
