294 



INDEX 



Water hemlock as a poisonous plant, 87 



Water hyacinth in Florida, 246 



Weather and poisoning, 14 



Weed-killers, chemical, 256 



Weeds, absolute, 241; as annuals, 252; as 

 biennials, 254; as perennials, 254; as 

 winter annuals, 252; classification of, 

 252; crown, 254; definition of, 241; 

 destruction of, 255; distributed by 

 automobiles, 245; distributed by 

 flying seeds, 245; by trains, 245; 

 growth by runners, 245; injurious 

 nature of, 241-243; introduced in 

 manure, 257; introduction and distri- 

 bution, 243; legislation on, 257; lines 

 of travel, 246; means of distribution, 

 245; relative, 241; repeated cutting 

 of, 255; seeds in Colorado, list of, 

 262; smothering with paper, 256; 

 special examples, 246; vitality of 

 buried seeds, 255 



Welsh onion, 227 



Wheat, 128, 164; adaptation of, 167; 

 bread, 165; cultivation of, 168; de- 

 scription of, 165; durum, 165; Polish, 

 165; production, 155; poulard, 165; 

 rotation of, 167; yield of, 168; naked, 

 165 



Whitall, Tatum & Co., mentioned, 154 



White clover, description of, 195; dis- 

 tribution of, 197; hay, 197; pasturage, 

 197; rotation of, 196; seeding, 197; 

 soils, 197; uses of, 196 



White hellebore as a poisonous plant, 51 

 White snakeroot as a poisonous plant, 104 

 Whorled milkweed as a poisonous plant, 



99 



Wikzemski, work of, 89 

 Wild black cherry as a poisonous plant, 



67 



Wild indigo, 185 

 Wild rice, 128 

 Windsor bean, 207 

 Winslow, Dr., quoted, 66 

 Wistaria, 181; sinensis, 185 

 Wolff -Lehmann standards, 121 

 Wooly loco weed as a poisonous plant, 



74 

 Wormwood, 244 



Xanthosoma atrovirens, 226 



Yam, 226 



Yautia, 226 



Yeh-peh-ho, 230 



Yellow clover, 187 



Yew, 42 



Yucca elata, 213; glaiica, 213 



Zea mays, 155; poisoning by, 45 

 Zingiber officinale, 226 

 Zygadenus venenosus as a poisonous 

 plant, 47 



