Ribes 
Victoris, 213 
villosum, 224 
viridifolium, 208 
viscosissimum, 202 
viscosissimum Hallii, 203 
viscosissimum Purshii, 202 
vulgare, 198 
vulgare hortense, 198 
VWatsonianum, 218 
Wilsonianum, 215 
Wolfii, 207 
Robtergia 
giabra, 233 
Robsonia 
speciosa, 212 
Rourea 
frutescens, 236 
glabra, 233 
hondurensis, 236 
oblongifolia, 233 
oblongifolia floribunda, 234 
paucifoliata, 234 
suerrensis, 234 
Saxifraga 
pectinata, 255 
Schizono tus 
argenteus, 266 
argenteus alpestris, 265 
argenteus ariaefolius, 262 
argenteus discolor, 262 
argenteus dumosus, 263 
argenteus fissus, 265 
argenteus griseus, 264 
argenteus intermedius, 263 
argenteus Mutisianus, 266 
ariaefolius, 262 
discolor, 262 
discolor ariaefolius, 262 
discolor dumosus, 263 
discolor fissus, 265 
discolor Purshianus, 262 
dumosus, 263 
sorbifolius, 257 
Serico theca 
argentea, 266 
Boursieri, 263 
concolor, 264 
discolor, 262 
dumosa, 263 
fissa, 265 
franciscana, 262 
glabrescens, 265 
microphylla, 264 
Serico theca 
obovata, 264 
pachydisca, 263 
saxicola, 263 
Schaffneri, 264 
velutina, 268 
Sibbaldia 
californica, 271 
congesta, 280 
Sorbaria 
Millefolium, 257 
sorbifolia, 257 
Spiraea 
acuminata, 265 
alba, 249, 250 
alba latifolia, 249 
amena, 250 
americana, 256 
arbuscula, 247 
argentea, 265, 266 
ariaefolia, 262 
ariaefolia discolor, 263 
Aruncus, 255 
Aruncus americana, 256 
Aruncus hermaphrodita, 256 
Beauverdiana Steveni, 247 
bethlehemensis, 249 
betulifolia, 247, 248 
betulifolia corymbosa, 248 
betulifolia rosea, 247 
Boursieri, 263 
caespitosa, 253, 255 
ceaespitosa elatior, 254 
californica, 261 
callosa, 249 
capitata, 241 
c@roliniana, 242 
carpinifolia, 249 
chamaedrifolia, 247 
chamaedrifolia media, 247 
chamaedryfolia, 24" 
ciliata, 250 
cinerascens, 253 
corymbosa, 248 
corymbosa lucida, 248 
erenata, 249 
euneifolia, 250, 251 
densiflora, 248 
denudata, 267 
discolor, 262, 263 
discolor ariaefolia, 262 
discolor dumosa, 263, 264 
discolor glabrescens, 265 
Douglasii, 251 
