[NDEX 



Micropyle, 183, 261. 

 Microsphaera, 73, 76. 

 Microsporangium, 134, 135, 130, 172, 173, 



'74. '77. 184, l89, -"->. -'-". »57i -' 

 Microspore, 133, 175. 

 Microsporocarp, 171, 172, 173, 174. 



Mi. rosporophyu, 135, 795, 214, 220, 257. 



Mi. Ml.- layers, anthers, 257. 



Mildews, 75, 76. 



Mimosa, leaf, 432. 



Miscible, 303. 



Monadelphous stamens, 255. 



Monoblepharis, 64. 



Monocotyledons, classification, 276; em- 

 bryo, 273, 274, 275; vascular system, 244, 

 245, 246. 



Monosiphonous, algae, 45. 



Moonwort, i4g, 150. 



Morchella, 71. 



Morel, 71. 



Morphin, 415. 



Morphogeny: stimuli, 435. 



Morphology, 1, 295. 



Mosses, no. 



Mother cell, 127. 



Motor organs, 451. 



Movement, 417 ; amoeboid, 444; autono- 

 mic, 453; of cell organs, 430; ciliary, 445, 

 446; contact, 432, 434; excretory, //<,- 

 gravity, 455 ; growth, 457 ; leaf, 455, fs6; 

 nyctitropic, 436 ; paratonic, 454 ; photeo- 

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



Mucilage, blue-green algae, 6. 



Mucor, 67, 68, 6g, 435. 



Mucorales, 67. 



Muscarin, 415. 



Must i. no. 



Mushrooms, 87. 



Mutation, 288. 



Mutualism, 382. 



Mycelium, 61. 



Mycetozoa, 2. 



Mycorhiza, 74, 382, 383. 



Myriophyllum, stem section, 320. 



Myxobacteriaceae, 14. 



Narcotin, 415. 



Nastic movements, 431. 



Nasties, 432. 



Natural selection, 285. 



Nectary, 339. 



Nemalion, 36. 



Neottia, mycorhiza, 383. 



Nepenthes, leaf, 385. 



Nephrodium, sperm, 444. 



Nereocystis, 47, 48. 



igi, 90. 

 Nicotiana, flower, 253. 



114, 119, 120. 



49; conclusions, 154. 



^9 ; habit, 150; sporangium 



Nicotin, 415. 



Nidulariales, 90. 



Nitella, 42. 



Nitrogen, source of, 378. 



Nodes, 41, 145. 



Nostoc, 7, 8. 



Notothylas, 106, 108. 



Nucellus, 183. 



Nucleus, 6, 15, 16, 2Q7. 



Nutation, 423, 424. 



Nutrition, 356. 



Nutritive mechanism, in ovule, 266. 



Oedogonium, 27, 29, 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 



Ophioglossales, 



Ophioglossum, 1 

 *J2, i53- 



Orchidales, 278. 



Organ, 297. 



Organized bodies, structures, 300. 



Organogeny, flowers, 256. 



Orthogenesis, 289. 



Orthotropic organs, 459. 



Orthotropous ovules, 261. 



Oscillatoria, 6, 7. 



Osmosis, 302, 305. 



Osmotic pressure, 309. 



Osmunda. sporangium, 136; stele, 162. 



Osmundaceae, 155. 



Outgo, material, 323. 



Ovary, 260. 



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

 oosperms, 196, 107, 198, 205, 206, 20Q, 210, 

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



Oxalic acid, 414. 



Palisade, leaf, 250, 251, 31 0. 



Palmales, 277. 



Palmella, 26. 



Pandanates, 276. 



Pandorina, 17. 



Panicum, coleoptile, 465. 



Panmixia, 29). 



Pappus, 282. 



Parallelotropic organs, 458, 460. 



Paraphyses, 30. 31, 117. 



Parasite. 6l, 381 ; injury by, 383. 



Parasitism. ;8i. 



Paratonic movements, 454. 



