694 Index 
Werauhia (cont.) 
vulcanicola, 374 
werckleana, 374 
williamsii, 375 
Wittmackia 
lingulata, 301 
odora, 301 
Wolffia, 618 
Wolffia 
welwitschii, 622 
Wolffiella, 622 
lingulata, 622 
oblonga, 622 
welwitschii, 622 (622) 
Wolffiopsis 
welwitschii, 622 
Woodsonia 
scheryi, 277 
Xanthosoma, 195 
atrovirens, 197 
croatianum, 196 
cubense, 199 
dealbatum, 196 
helleborifolium, 199 
hoffmannii, 198 
jacquinii, 198 
mafaffa, 197 
mexicanum, 196 
nigrum, 197 
pentaphyllum, 199 
pilosum, 196 
robustum, 197 
roseum, 197, 198 
sagittifolium, 197 (197) 
undipes, 198 
violaceum, 197 
wendlandii, 198 
xanthorrhizon, 197 
Xiphidium, 576 
caeruleum, 576 (576) 
Yucca, 34 
aloifolia, 34 
elephantipes, 34 
guatemalensis, 34 (34) 
Zamia, 14 
acuminata, 15 
fairchildiana, 15 (15) 
neurophyllidia, 16 
obliqua, 16 
pseudomonticola, 15 
pseudoparasitica, 14 
skinneri, 16 
skinneri, 16 
Zamiaceae, 14 
Zantedeschia, 199 
aethiopica, 199 (199) 
albomaculata, 200 
elliottiana, 200 
rehmannii, 200 
Zebrina 
flocculosa, 407 
pendula, 407 
Zephyranthes, 55 
carinata, 55 
grandiflora, 55 (55) 
lindleyana, 55 
macrosiphon, 55 
