INDEX 



Micropyle, 183, 261. 



Microsphaera, ys, 76. 



Microsporangium, 134, 135, ijp, 172, I'j^, 

 174, 177, 184, i8q, 20s, 220, 257, 25S, 2sg. 



Microspore, 13s, ijs- 



Microsporocarp, lyi, 172, 1J3, 174. 



Microsporophyll, 135, ig;, 214, 220, 257- 



Middle layers, anthers, 257. 



Mildews, 75, 76. 



Mimosa, leaf, 452, 



Miscible, 303. 



Monadelphous stamens, 255. 



Monoblepharis, 64. 



Monocotyledons, classification, 276 ; em- 

 bryo, 273, 274, 27s; vascular system, 244, 

 24s, 246. 



Monosiphonous, algae, 45. 



Moonwort, 149, iso. 



Morchella, 71. 



Morel, 71. 



Morphin, 415. 



Morphogenic stimuli, 435. 



Morphology, x, 295. 



Mosses, no. 



Mother cell, 127. 



Motor organs, 451. 



Movement, 417 ; amoeboid, 444; autono- 

 mic, 453; of cell organs, 450; ciliary, 445, 

 445; contact, 452, 454; excretory, 445; 

 gravity, 455 ; growth, 457 ; leaf, 455, 456: 

 nyctitropic, 456; paratonic, 454 ; photeo- 

 lic, 455, 456; turgor, 451, 457. 



Mucilage, blue-green algae, 6. 



Mucor, 67, 68, 6q, 43s. 



Mucorales, 67. 



Muscarin, 415. 



Musd, no. 



Mushrooms, 87. 



Mutation, 288. 



Mutualism, 382. 



Mycelium, 61. 



Mycetozoa, it. 



Mycorhiza, 74, 382, 383. 



Myriophyllum, stem section, 320. 



Myxobacteriaceae, 14. 



Narcotin, 415. 

 Nastic movements, 431. 

 Nasties, 432. 

 Natural selection, 285. 

 Nectary, 330. 

 Nemalion, 56. 

 Neottia, mycorhiza, 383. 

 Nepenthes, leaf, 385. 

 Nephrodium, sperm, 444. 

 Nereocystis, 47, 48. 

 Nest fungi, 90. 

 Nicotiana, flower, 253. 



Nicotin, 415. 



Nidulariales, 90. 



Nitella, 42. 



Nitrogen, source of, 378. 



Nodes, 41, 145. 



Nostoc, 7, 8. 



Notothylas, 106, loS. 



Nucellus, 183. 



Nucleus, 6, IS, 16, 297. 



Nutation, 423, 424. 



Nutrition, 356. 



Nutritive mechanism, in ovule, 266. 



Oedogonium, 27, 2g, 30. 



Oil receptacle, 340. 



Oils, essential, 413. 



Ontogeny, 295. 



Oogonium, 27, 28, 30, 31, 36. 



Oomycetes, 62. 



Ooplasm, 66, 



Oosphere, 17. 



Oospore, 18. 



Operculum, 113, 114, 119, 120. 



Ophioglossales, 149; conclusions, 154. 



Ophioglossum, 149 ; habit, 150; sporangium, 

 152, 153- 



Orchidales, 278. 



Organ, 297. 



Organized bodies, structures, 300. 



Organogeny, flowers, 256. 



Orthogenesis, 289. 



Orthotropic organs, 459. 



Orthotropous ovules, 261. 



OsciUatoria, 6, 7. 



Osmosis, 302, 305. 



Osmotic pressure, 309. 



Osmunda, sporangium, 156; stele, 162. 



Osmundaceae, 155. 



Outgo, material, 323. 



Ovary, 260. 



Ovule, 183 ; angiosperms, 260, 261 ; gym- 

 nosperms, 196, IQ7, 198, 205, 206, 2og, 210, 

 213, 214, 221, 222, 232, 233, 234. 



Oxalic add, 414. 



PaUsade, leaf, 2S0, 251, 3ig. 



Palmales, 277. 



Palmella, 26. 



Pandanales, 276. 



Pandorina, 17. 



Panicum, coleoptile, 46;. 



Panmixia, 291. 



Pappus, 282. 



Parallelotropic organs, 458, 460. 



Paraphyses, so, si, 117. 



Parasite, 61, 381 ; injury by, 383. 



Parasitism, 381. 



Paratonic movements, 454. 



