INDEX. 



329 



Woundwort 243 



Xanthium 2G7 



Xanthoxalis 191 



Xolisma 223 



Xyridaceae 115 



Xyris 115 



Yam 125,233 



family 125 



wild 125 



Yarrow 290 



Yellow cress 165 



crownbeard 288 



flag 126 



foxtail 80 



iron- weed 287 



jasmine 227 



lady's-slipper. . . . 128 



Page. 



Yellow pimpernel 218 



pine 61 



pondlily 155 



sweet clover 183 



violet '. 207 



wood-sorrel 191 



Yellow-eyed grass 115 



grass family 115 



Yucca 120 



Zanniehellia 64 



Zanthoxylum 192 



Zea 66 



Zebrina 115 



Zigzag bladderwort 255 



Zizania 81 



Zizia 218 



Zygophyllaceae 192 



