433 



INDEX 



Mucilage, 38, 58, 149, 150, 167, 281, 

 302 ; of Algae, 188, 205, 213. 

 217, 222, 225. 



Mucilage-cavities, 152 ; cells, 273 

 (fig.) ; glands, 150 (fig.). 



Mucilaginous walls, 38, 95, 184, 189 

 (fig.), 202, 214, 262. 



Mucor, 231, 252, 257, 406 ; structure 

 and life-history of, 236-8 (fig.). 



Mucor-yeast, 257. 



Mulberry (Morus), 370. 



Mullein (V erbascum) , 103, 378. 



Multicellular, i. 



Multiciliate zoospores, 218 (fig.). 



Multinucleate structures, 153, 198, 

 208, 218 (fig.), 224, 234, 326, 

 361, 368. 



Musci, 269, 274-7 (figs.), 304, 

 407 ; antheridia of, 279 (fig.) ; 

 archegonia of, 280 ; branching 

 of, 274, 275 ; embryo of, 284, 

 285 (fig.) ; fertilisation in, 

 281 ; growing point of, 18, 

 276 ; habitat of, 269, 277 ; 

 leaves of, 112, 274, 275 (fig.) ; 

 protonema of, 287 (fig.), 288 ; 

 rhizoids of, 274 ; sporogonia 

 of, 284-7 ( n -) '> stern of, 

 275 (fig.), 276 ; stomata of, 

 100, 284, 285 (fig.) ; vegetative 

 reproduction of, 277, 287 (fig.), 

 288. 



Mushroom (Agaricus), 245, 255, 

 407 ; structure and reproduc- 

 tion of, 248, 249 (fig.). 



Musk (Mimulus moschatus), pollen 

 of, 362 (fig.). 



Mustard (Sinapis), 69. 



Mustard oil, 48, 63. 



Mutants, 381 (fig.), 382, 384. 



Mutation, 380-82 (fig.) ; vegeta- 

 tive, 382, 383 (fig.), 390. 



Mycelium, 230, 236, 237 (fig.), 239, 

 243, 248. 



Mycorrhiza, 72, 252, 316 ; of Bird's- 

 Nest Orchid (Neottia), 72, 73 



(fig-)- 

 Myrica gale, 268 ; ovule of, 357, 



359- 



Myriophyllum, 171. 



Myronate of potash, 48. 



Myrosin, 48, 53. 



Myrtaceae, 62. 



Myrtle (Myrtus communis), secre- 

 tory cavities of, 151. 



Myxomycetes, 250, 251. 406. 



Myxophyceae, 406. See Cyano- 

 phyceae 



Naked cells, 184, 186, 213, 250, 



366 ; flowers, 354. 

 Narcotics, 61. 

 Nasturtium, Garden (Trop&olum), 



63, US- 

 Natural hybrids, 385 (fig.), 388, 



389. 



Natural selection, 378, 390. 



Navicula, 207 (fig.). 



Neck of, archegonium of, Conifers, 

 348, 349 (fig.) ; Cycads, 326, 

 327 (fig.) ; Ferns, 302, 303 

 (fig.) ; Liverworts, 280, 281 

 (fig.) ; Mosses, 280 ; Selaginella, 

 319, 320 (fig.). 



Neck-canal cells, 280, 302. 



Nectaries, 144, 363 ; mechanism 

 of, 149 ; structure of, 148, 



149 (fig-). 



Nectria, 239, 242, 253. 

 Needle-shaped crystals, 58, 59 (fig.), 



237- 



Negative pressure, 35, 69. 

 Neottia nidus-avis, 179; mycorrhiza 



of, 72, 73 (fig.) ; pollen of, 361, 



362 (fig.). 

 Nepeta glechoma, 168 ; epidermis 



of, 94 (fig.). 



Nepenthes, glands of, 149. 

 Nephrodium filix-mas, sorus of, 296 



(fig.), 298 (fig.) ; sporangium 



of, 299 (fig.) ; spore-formation 



in, 307 (fig.) ; stem of, 290, 



294 (fig-)- 



Nerium oleander, leaf-structure of, 

 no, 161 (fig.), 162. 



Nettle (Urtica), hairs of, 104, 105 

 (fig.) ; leaf-structure of, 38 

 (fig.), 39 ; root of, 132. 



New species, origin of, 378, 380, 

 381, 382, 393. 



New Zealand Flax (Phormium 

 tenax], 34-. 



Nicotiana tabacum, 61. 



Nicotine, 61. 



Nightshade, Deadly (Atropa bella- 

 donna], 6 1 ; Enchanter's 

 (Circ&a lutetiana), 58, 59 (fig.), 

 146, 168. 



Nitrate-Bacteria (Nitrobacter), 266. 



Nitric acid, and proteins, 50. 



Nitrite-Bacteria (Nitrosomonas}, 266. 



Nitrobacter, 266. 



Nitrogen-fixation, 266, 267 



Nitrogen-fixing Bacteria, 266, 267 



(fig-)- 



Nitrogenous food-reserves, 50-52. 

 Nitrosomonas, 266. 



