318 
Torreya, 227. 
Tracheid, 124. 
Tracheary tissue, 124. 
Tradescantia, 4, Fig. 1. 
Trailing arbutus (Zpigza repens), 
214. 
Traveller’s tree (Ravenala Madagas- 
eariensis), 193. 
Tree-ferns, 131. 
Tremella, 94, Fig. 25. 
Trichia, 32, Fig. 4. 
Trichina, 90. 
Trichogyne, 74, 75, Fig. 20. 
Trichomanes, 127, 135, Fig. 35. 
Tricocce, 210. 
Trillium, 190, 239. 
Tropics, 231, 234, 240. 
. Tropceolum (see also “‘ Nasturtium ”’), 
249, 250, 251, Fig. 56. 
True mosses (see also ‘‘ Musci’’), 
113, 114, 115, 116, 117, 120, Figs. 
29, 30. 
Trumpet-creeper (Tecoma radicans), 
214, 249, 252. 
Tubers, 192, 202, 273. 
Tubercles (on roots of Leguminose), 
280. 
Tuberose, 190. 
Tubiflore, 214, 218. 
Tulip-tree (see also ‘“‘Lirioden- 
dron’’), 207, 230, 238, Fig. 50. 
Tunicates, cellulose in, 11. 
Twining stems, 278, 282, Fig. 60. 
Typhacee (see also ‘‘Cat-tail 
rushes’’). 186. 
U 
Ulothrix, 52, Fig. 8. 
Umbel, 212. 
Umbelliferz, 211, 212, 218. 
Unicellular plants, 10, 20, 284. 
Urn (Theca), 117, Fig. 30. 
Uromyces Caladii, 89, Fig. 23. 
Utricularia (see also ‘‘ Bladder- 
weed’’), 108, 204, 258, 259, 270, 
Fig. 58. 
INDEX 
Vv 
Vacuoles, 7. 
Vallisneria (see also ‘‘ Eel-grass’’), 
22. 
Valve (of Diatom), 65. 
Vampyrella, 31. 
Vascular bundles, 113, 124, 134, 140, 
141, 143, 146, 162, 168, 172, 183, 189, 
191, 200, 267, 291; of Conifers, 168, 
172; of Dicotyledons, 200; Ferns, 
124, 134; Lycopods, 146, 162; Mono- 
cotyledons, 183. 
Vascular Cryptogams (see ‘‘ Ferns,” 
“Pteridophytes’’), 122. 
Vascular plants, 14, 108, 220. 
Vaucheria, 57, 58, 59, 82, 83, 84, Fig. 
12; reproduction in, 57, 58; struct- 
ure of thallus, 57; V. sessilis, 57, 
Fig. 12. 
Venation of leaves, 201. 
Venter (of archegonium), 102, 103, 
111, 129. 
Venus’s fly-trap (Dionza), 205, 257, 
Veronica, 215, Fig. 53. 
Vertebrates, absence of non-sexual 
reproduction in, 25. 
Vessels, 124. 
Vine family (Vitacez), 209. 
Violet, 209. 
Vittaria, 126, 127. 
Volvocacee, Volvocineex, 27, 38, 39, 
41, 42, 43, 46, 49, 50, 52, 55, 58, 60, 
76, 77, 79, 284, 285, Fig. 6. 
Volvox, 39, 40, 41, 42, 76, 286, Fig. 6; 
reproduction of, 41. 
Ww 
Wall-fiower, 210, Fig. 51. 
Washington, 239. 
Water, 30, 103, 262, 263, 269. 
Water-ferns (see also ‘‘ Hydropte- 
rides’’), 151. 
Water-lily (see also ‘‘ Nymphza- 
ceze ’’), 204, 207, 208. 
Water-moulds (see also ‘‘Saproleg- 
nia, Saprolegniacez ’’), 81, 82, 83, 
84, 85, 86, 242, Fig. 21. - 
