INDEX 



603 



Trichomas, 19, 70. 



Tropical, Rain Forest, 584 ; under- 

 growth, 59. 

 Tropophytes, 567. 

 Truffles, 451. 

 Truth, test for, 13. 

 Tuber, 9, 192. 

 Tuberacece, 451. 

 Tubercles, 245. 



Tuberous, Climbers, 568; roots, 251. 

 Tubiflorce, described, 554. 

 Tubular Algae, 429. 

 Tuft Trees, 570. 

 Tulip Tree, cross section, 121. 

 Tumbleweed, 359, 506. 

 Turnboa, 71, 524. 

 Tumors, 200. 

 Tundra, 586. 



Turf-forming Grasses, 568. 

 Tussock Plants, 574. 

 Twin fruit, 196, 199, 367. 

 Twiners, 185. 

 Twining Vines, 575. 



Ulothrix, 446, 563 ; zonata, 420. 



Ulva Lactuca, 422. 



Umbel, 337. 



Umbellales, described, 552. 



Umbelliferoe, 552. 



Umbellifers, 552. 



Undrained Habitats, 571. 



Unit character, 309. 



Uredinales, described, 465. 



Uroglena, 411. 



Urticales, described, 542. 



Ustilaginales, described, 464. 



Ustilago Maydis, 465. 



Utricularia Grafiana, 555 ; minor, 



Vallisneria, 284, 287, 530. 



Valvate, 329. 



Variability, 39. 



Variation, 308; defined, 308, 314; 



selection, 318. 

 Varieties, 392. 

 Vascular, bundles, 116, 264; plants, 



492. 

 Vaucheria, 563 ; sessilis, 430. 

 Vegetables, 206 ; vs. fruits, 346. 

 Vegetation, 558 ; forms, 559. 

 Vegetative, bodies, specialized, 299 ; 



parts, potential, 300. 

 Veinlet, 31. 



Veins, 29, 118; of leaf, 17, netted, 

 17 ; parallel, 17 ; use, 144. 



Velum, 472. 



Venation, 65 ; netted, 65 ; palmate, 

 66 ; parallel, 66 ; pinnate, 66. 



Ventilation, 369, 371. 



Venus Fly-trap, 76, 77, 246, 579. 



Vernation, 137. 



Verticillales, described, 540. 



Viability, 380 ; tests, 386. 



Victoria regia, 546, 547. 



Violet, seed pods, 364. 



Viscum album, 544. 



Visitants, 581. 



Vitacem, 550. 



Vitalistic conception of nature, 39, 

 40. 



Vitality, suspension, 377. 



Volva, 471. 



Volvox, 419, 563. 



Walking Fern, 498. 



Walnuts, 541. 



Waste Ground Formations, 586. 



Water, Blooms, 401, 563; capillary, 

 in soils, 239 ; Ferns, 499. ; flotage 

 by, 360; Grasses, 572; Habitats, 

 561 ; Hyacinth, 535, 572 ; hydro- 

 static, 238; hygroscopic films, 

 239 ; Lilies, 546 ; Lily seed, 361 ; 

 Molds, 435 ; in seeds, 377 ; in 

 soils, 238 ; uses in plants, 224. 



Water culture, 243 ; described, 242. 



Water-net, 418. 



Water plants, 9, 61, 251 ; character- 

 istics, 562; roots, 252. 



Waterside Formations, 586; Herbs, 

 572. 



Water-weeds, 530. 



Wax, 111. 



Weeping Birch, 182. 



Welwitschia, 71, 524 ; flower, 524. 



Wheat Rust, 466, 467; life cycle, 

 467. 



White Rust, 436. 



Whorl, 140. 



Wild, Geranium, 334; Ginger, 544. 



Will-o'-the-wisp, 408. 



Wilting, 48. 



Wilts, 367. 



Wind, effects on trees, 183; pol- 

 linated flowers, characteristics, 

 288; pollination, 288; waftage, 

 358. 



