498 



GLOSS A RIAL INDEX. 



Transverse planes, 382. 



Trees, age of, 139. 



Tnchoblast (0pt [gen. rpi^os], hair; 

 /SAaards, shoot), a name proposed by 

 Sachs for such idioblasts as are es- 

 pecially distinguished by size and 

 branching. 



Tricliogyne, 440, n. 



Trichomes (t^ f , hair), 65, 68, 230. 



Trinitrophenic acid. See Picric Acid. 



Trioleiu. See Olein. 



Tripalmatin. See Palmatin. 



Tristearin. See Stearin. 



Trommer's test for dextrin, 51. 



Trophoplast (rpo^o?, a feeder; TrAouraw, I 

 form), 287. 



Tiillen. See Tyloses. 



Turgescence, effect of organic acids upon, 

 414. 



Turpentine (C 10 Hi r ,), use of, in prepara- 

 tion of specimens for mounting, 23. 



Twining plants, 405. 



Tyloses (rv'Aos, a protuberance), 87. 



Typical cells. See Fundamental Cells. 



UNORGANIZED FERMENTS, 365. 

 Utricularia, 346. 



VACUOLES, 26, 111, 200, 212. n., 280, 



375, 397. 



Variegated plants, 477. 

 Varieties, 447. 

 Variety-hybrids, 455. 

 Vascular system. See Fibro-vascular 



System. 



v 



Vasculose, 35, n. 



Vasiform elements (was, vessel; forma, 



form), 81. 



Vasiform wood-cells. See Tracheids. 

 Vegetable acids, 360. 

 Vegetable mucus, occurrence of, in 



plants, 358; test for, 15. 

 Vegetable parchment, 32, n. 

 Venation of leaves, 156. 

 Vesque's method of producing crystals, 



55. 



Vessels, 55, 77, 82, 84; classified, 60; 

 size of, 86. 



Viola tricolor, coloring-matters in flowers 



of, 170. 



Vitality of seeds, 205, 461. 

 Vitellin, 364. 



WARDIAN CASES, 474. 



Water, absorbed previous to metasta- 



sis, 267 ; absorption of gases by, 300, 

 n.; action of steam upon chlorophyll, 

 290, 475, n. ; an agent in the formation 

 of soils, 237; amount of, contained in 

 plants, 236; amount of, given off in 

 transpiration, 271; amount of, required 

 for germination, 4ti2; direction in 

 which tissues most readily conduct, 

 262, n.\ effect of absorption of, upon 

 seeds, 4b3 ; effect of, upon protoplas- 

 mic movements, 20'J; effect of, upon 

 opening and closi. g of stomata, 270; 

 equilibrium of, in the plant, 258; ex- 

 udation of, from uninjured parts of 

 plants, 267 , method of determining 

 amount of, in dry wood, 261 ; rate of 

 ascent of, in stems, 261, 263; relations 

 of, to tissues, 257 ; relative amount of 

 space occupied by, in fresh wood, 261; 

 transfer of, in plants, 257, 269; trans- 

 port of soils by, 238; use of, as a 

 medium, 5; use of, as a mounting- 

 medium, 21. See also Moisture. 



Water-culture, 248; directions for, 249; 

 first application of method of, 249; so- 

 lutions for, 250. 



Water-plants, size of, 188; structure of 

 land-plants compared with that of, 

 257. 



Water-pores, 73. 



Water tissue, 62, 280. 



Waxy coatings upon the epidermis, 66. 



White chlorophyll, 322. 



White lead as a varnish, 24. 



Wiesner's tests for lignin, 10, 14, 37. 



Wild plants, supply of nitrogen to, 334 



Wilting of leaves, 471. 



Winterkilling, 472. 



Withering of stems, how prevented, 263. 



Wood, autumn, 138, 395; color of, 141; 

 density of, 144; identification of, by 

 histological features, 145, n. ; odor of, 

 142; preservation of, 142; spring, 138, 

 396; structural characters of, 146, n. 



Wood-cells, 57, 78, 82; size of, 86, w. } 

 143. See also Tracheids. 



Wood elements, inclination of, to the 

 axes of trees, 143. 



Wood-fibre used for paper-pulp, 145. 



Wood-parenchyma, 77. 



Woodward's carmin, 17. 



Woody fibres, 57, 80. See also Wood- 

 cells. 



Woody rings, 114, 137; demarcation 

 between, 139 ; size of, 140 ; two, 

 formed in a single year, 139. 

 Work of the plant, 185. 



