506 



INDEX. 



Growing apex, in stem of Elodea,212 ; 

 of Equisetum arvense, 215 (figs. 84, 

 85, 86) ; Euonymus japonicus, 

 212 (fig. 83); of Fraxinus, 215; 

 Gymnosperms, 211 ; Hippuris vul- 

 garis, 204 (fig. 82) ; Myriophyllum, 

 212. 



in thallus of Fucus, 241. 



methods of investigation, 210. 



to cut sections, 204 ; to make 



transparent, 210. 



point. See growing apex. 

 Guard-cells. See stomata. 

 Gum, 99. See mucilage. 



non-brittle, 32 ; for preserving 



drawings, 45. 



use of, for section-cutting, 231, 389, 



409 ; to slacken movements of 



spermatozoids, 359. 

 Gymnocladus canadensis, leaf -fall, 203. 

 Gymnogramme, germination of spores, 



363. 

 Gymnosperms, apical histogens of, 211, 



224 (fig. 88) ; definition of, 367 ; 



reproduction, 367 (figs. 134-9); 



root-apex, 222; spermatozoids in, 



376. See also Picea, Pinus, Tax us. 

 Gynoecium, of Angiosperms, 394, 395. 



HA DROME, 104. 



Haematin-ammonia, use and prepara- 

 tion of, 248. 



Hcematococcus pluvialis, 260. 



Haematoxylin, use of, 35, 64, 243, 300, 

 324, 386. See also Appendix III. 



Hair-roots. See rhizoids. 



Hairs, 86-98 ; structure of, in Clieiran- 

 thus Cheiri, 90 (fig. 33) ; Elaeagnus, 

 93 ; Matthiola annua, 92 (fig. 33) ; 

 Sheplierdia, 93 (fig. 35) ; Trades- 

 cantia 38 (fig. 14) ; Verbascum 

 nigrum, 92 ; V. tluipsiforme , 93 ; 

 Viola tricolor, 92 (fig. 34). 



- bristles, of Urtica dioica, 97. 



glandular, in Primula, 97 ; Pelar- 



gonium, 97. 



movement of protoplasm, in Hydro- 



charis, 47 ; in Tradescantia, 39. 



- papillae, 35, 56, 57. 



- prickles, of Rosa, 94. 



root. See root-hairs. 



scales of Eleagnus angustifolia, 94 ; 



Shepherdia canadensis, 93 (fig. 35). 



stinging, of Urtica dioica, 95 (fig. 



36). 



Hand-vice, xxx ; use of, 26, 72. 

 Hart's tongue fern. See Scolopen- 



drium. 

 Haustoria, of Cliwtocladinm, 317 ; of 



Phytophthora, 320. 

 Hay-bacillus, 277. 



Heat, action of, on starch, 22 ; fixing 

 by, 271. 



Hedera Helix, resin canals in, 152 (fie. 

 57*). 



Helianthus, substitute for Aristolocliia, 

 136. 



Heliotropism of spermatozoids, 303. 



Hellebore. See Helleborus. 



Helleborus fcetidus, pollen-cell and 

 nuclear division, 443 (fig. 155) ; 

 pistil, 395. 



niger, leaf structure, 194 ; pistil, 

 396. 



Hemerocallis fulva, structure and de- 

 velopment of anther, 380 (fig. 

 140) ; pistil, 396 ; pollen, 381 (fig. 

 140). 



Heracleum Sphondylium, use of hairs 

 of, 361. 



Hermaphrodite, 298. 



Heterocyst, 261. 



Heteroscious (parasites), 332. 

 j Heteromerous (thallus of lichens), 240. 



Heterosporous, 365. 



Hibiscus, cork in, 182. 



Hinge, stomatic, 83, 84, 85, 87. 



Hippuris vulgaris, growing apex of, 

 204 (fig. 82). 



Histogen, histogenic layer, 211, 221, 

 226. 



Hollow stem, formation of, 122. 



Hollyhock. See Altha'a rosea. 

 i Homoiomerous (thallus of lichens), 

 240. 



Hordeum vulgare, growing apex of 

 root, 220 (fig. 87). 



Horse-chestnut. See JEsculus Hippo- 

 castanum. 



Horse dung, for Mucor culture, 312, 

 315 ; for micro-fungi, 318, 327. 



Horse-tail. See Equisetum. 



Hoya carnosa, pathological cork in 

 petiole, 188. 



Hoyer's ammonia-carmine. See car- 

 mine. 



j enclosing fluid. See mounting 

 fluid. 



Hyacinth, development of pollen in, 

 385; pistil, 396; root, 165; sto- 

 mata, 84. 

 ' Hyaloplasm, 39. 

 | Hydrocharis Morsus-Rance, movement 



of protoplasm in root-hairs, 47. 

 | Hydrochloric acid, use of, 69, 78, 96, 



258. 



- half per cent, in 70 per cent, al- 

 cohol, use of, 273. 

 as reagent for calcium oxalate, 64. 



Hydroids = tracheides, q.v. 



Hygroscopic, 350. 



Hygroscopism, 364. 



