INDEX 



423 



Dentifrices, 207. 



Depression of stomata, 96, 158, 160 

 (fig.), 165, 170. 



Dermatogen, 19, 20, 74, 95, 369. 



Desert, distribution of, 391. 



Desert-plants, 178. 



Desmidium, 209 (fig.). 



Desmids (Desmidiaceae), 192, 211 ; 

 reproduction of, 209 (fig.), 

 216, 220, 228 ; structure of, 

 208-10 (fig.). 



Deutzia, hairs of, 102 (fig.), 103. 



Development of, anther, 360 (fig.), 

 361 ; ascospores, 240 (fig.), 

 245 ; cambium, 117, 118 (fig.) ; 

 cork-cambium, 135, 136 (fig.), 

 137 ; Fern-leaf, 290 (fig.), 291 ; 

 Fern-prothallus, 299 (fig.), 

 300 ; Fern-sporangium, 291-9 

 (fig.) ; gametes, 184 (fig.), 213 

 (fig.), 214; gonidia, 232, 243 

 (fig.) ; laticiferous cells, 153 ; 

 laticiferous vessels, 154 ; 

 lateral branches of root, 65, 71 

 (fig.) ; lateral branches of 

 stem, 90 ; leaves, 19 (fig.), 90 ; 

 lenticels, 139 ; Moss-plant, 287 

 (fig.), 288 ; Mushroom (Agari- 

 cus), 248, 249 (fig.) ; ovules of 

 Angiosperms, 358 (fig.), 359 ; 

 pollen grains, 360 (fig.), 361 ; 

 procambial strands, 89 ; root- 

 cap, 1 8, 20 (fig.), 65 ; secre- 

 tory cavities, 151 ; sieve-tubes, 

 28 ; spermatozoids, 277 ; 

 spores, 305-8 (fig.) ; sporo- 

 gonium of Liverworts, 282 ; 

 sporogonium of Mosses, 284, 

 285 (fig.) ; stamens, 360 (fig.), 

 361 ; starch - grains, 41 ; 

 stomata, 98 ; tyloses, 126 ; 

 vascular tissues, 89, 90 ; vessels, 

 28 ; zoospores, 212, 213 (fig.), 

 216, 217 (fig.), 218 (fig.), 219 

 (fig.). See also under Embryo- 

 logy. 



De Vries, 381. 



Dextrin, n, 46, 47, 53. 



Dextrose, 45. See also Glucose. 



Dialysis, 57. 



Diaphragm, of aquatics, 175 ; of 

 microscope, 399, 400 ; of Moss- 

 capsule, 285 (fig.), 286. 



Diarch roots, 69, 70, 131 (fig.), 295, 



341. 



Diastase, 46, 53, 56 ; extraction of, 



53, 54- 

 Diatomaceous earth, 207. 



Diatoms (Diatomaceae), 39, 192 

 193 (fig.), 206, 207 (fig.), 208 

 211, 406 ; reproduction of, 216 



219, 228. 



Dicotyledonous timbers, 129, 130. 



Dicotyledons, 355, 367, 408 ; em- 

 bryology of, 368-71 (fig.) ; 

 epidermis of, 93 ; leaf of, 93, 

 98, 107-14 (figs.) ; root of, 

 65-71 (figs.), 131 (fig.), 132 ; 

 stem of, 76-84 (figs.), 86, 117-30 

 (figs.), 135-41 (figs.). 



Dicranella heteromella, protonema of, 



287 (fig.). 

 Dictyota, 17 (fig.). 

 Differentiation of sex, 186, 212, 



220, 227, 228. 



Diffusion in plant-cells, 6, 12, 13, 



52. 

 Digestive glands, 144, 149, 150 



(fig-)- 



Digitalin, 48. 



Digitalis, 48, 363. 



Dioecious, 223, 225, 354. 



Dioon edule, 327 (fig.). 



Diospyros, 126. 



Direct nuclear division, 21. 



Disaccharides, 44, 45. 



Disc of Umbelliferae, 148. 



Discomycetes, 407. 



Diseases of plants, and immunity, 

 253 ; control of, 247, 253, 254 ; 

 due to animals, 143 ; due to 

 Bacteria, 265 ; due to Fungi, 

 230, 231, 235, 236, 242, 243, 

 245, 248, 251, 252, 253. 



Dispersal, 219, 392 (fig.), 393; barriers 

 to, 393 ; of gonidia, 232, 242 ; 

 of microspores, 326, 330, 345 ; 

 of oospores, 223 ; of seeds, 46, 

 50, 103, 353, 372 ; of soredia 

 of Lichens, 261 ; of spores, 

 238, 242, 245, 249, 253, 282; 

 287, 300, 313, 321 ; of zygo- 

 spores, 1 86. 



Dissipation of energy, 265. 



Distribution of plants, 391-3. 



Division of, cells, 16, 21-5 (figs.) ; 

 chloroplasts, 25 ; nuclei, 20-2 5 

 (figs.) ; spore mother-cells, 

 306-8 (fig.). 



Division of labour, 395 ; in Algae, 

 190, 197, 198, 199, 210, 223 ; 

 in Ferns, 308 ; in helero- 

 sporous plants, 321. 



Dock (Rumex], 113. 



Dock-family (Polygonaceae), 356. 



Dodder (Cuscuta), 178 (fig.), 179. 



