Index 
Vestiges of grass-petals, 166 
Vestiges of the prothallus in 
flowers, 295 
Vestiges of atrophied seeds, 83 
Vine-tips: 
hooked, 237 
revolution of, 237 
Vine-tips, speed of, 239 
Vines, Sidney, quoted, 320 
Virginia creeper, 237, 242, 245 
tendrils of, 243, 244 
Vitality of pines, 282, 283 
Von Sachs, Prof., quoted, 367, 
368 
Walnut, 69, 71 
Walnuts, 75 
Wasp, 34 
Waste of pollen, 28, 286 
Water-crowfoot, II2 
Water-fertilized flowers, 30, 31 
Water-loving plants, numerous 
seeds of, 185, 186 
Water-rushes, 180, 181 
capsules of, 185 
seeds of, 185, 186, 187 
Wayfaring tree, 57 
Webber, Herbert, 295 
Webster’s definition of a weed, 
347 
Weed of civilization, 361 
Weeds, 36, 37 
as weather prophets, 355, 356 
how they sow themselves, 349, 
350 
of grain-fields, 351 
Well-water, 103 
Wheat, I51 
blossom of, 172, 173 
Wheat-germ, 118 
White ash, 75, 76 
White campion, 225 
White clover, 339 
White lily, 108 
‘“‘White man’s foot,” 364 
Wide range of wind-fertilized 
plants, 286 
All 
Wild carrot, 349 ‘ 
Wild lettuce, 320 
Wild orange, 323 
Wild rice, 175 
Wild strawberries, 375 
Wild yew, 270 
Willow, 58, 61, 62 
pussy, 50 
swamp, 50, 54 
Willows, 49, 75, 93 
Wind-fertilized flowers, 30, 31 
Winged fruits, 85, 349 
Winged pollen of the conifere, 
287 
Winter bud, 88 
Winter refuge of birds, 280 
Wistaria, 239 
Witch-hazel, 381 
Wood, 132, 133, 134, 135 
of cone-bearers, 281, 
283, 
Wood-rushes, 180, 182 
capsules of, 185 
seeds of, 185 
Wood-thrushes, 345, 346 
Wood-vessels, 128, 130, 132 
‘“‘Wool grass,’’ IgI, 193 
Wound cork, 366 
Wych-elm, 382 
Wych-hazel, 381, 382 
282, 
Xyris flexuosa, 187 
Yarrow, 126, 165 
Yellow-eyed grass, 187 
Yew, 274, 276 
European, 270 
wild, 270 
Yews, 270, 298 
Yucca, habit of growth of, 131 
fertilization of, 208, 211 
filamentosa, 207, 208 
recurvifolia, 212 
Zamia integrifolia, 295 
