456 



PLANT MORPHOLOGY 



Microsporophyll, 233 



Cycadeoidea, 317 



Cycas, 323 



Ginkgo. 336 



Isoetet;, 244 



Pimis, 345 



SelagineUa, 233 

 Mildews, downy, 114 



other, 116 



powdery, 127 

 Mnium, 199 



antheridium, 201 



archegonium, 202 



capsule, 204 

 Monoblepharidales, 111 

 Monoblepharis. Ill 

 Monocotyledoneae, 316, 406 

 Monosiphonoiis, 67 

 Monospore, 89 

 Morchella, 133 

 Mosses, 192 



plan of, 207 

 Mougeotia, 60, 51 

 Mucorales, 117 



summary, 120 

 Multicellular bodies, development of, 95 

 Musci, orders, 192 



summary, 205 

 Mushroom, 149 

 Mycelium, 108 

 Mycophyta, 2, 3, 7 

 Myrtales, 403 

 Myxamoeba, 106 

 Myxobacteria, 103 

 Myxomycetes, plant body, 104 



reproduction, 105 



summary, 106, 156 



N 



Navicula, 22 



Nedria, 134, 135 



Nemalion, 87, 88 



Nereocystis, 79 



Neuropteris. 239, 312 



Nenrospora, 139 



Nidulariaceae, 152 



Nitrifying bacteria, 103 



Nitrobacter, 103 



Nitrogen-fixing bacteria, 102 



Nitrosomonos, 113 



Nosioc, 9 



Notoihylas, 187, 189, 190 



Nucellus, 312, 313, 323, 326, 347, 383 



Nucleus, fusion, 384, 386 



generative, 348, 391 



male, 350, 391, 392 



Nucleus, polar, 384, 390 

 primary endosperm, 392 

 tube, 328, 348, 350, 391 



O 



Oedogoniales, 45 



summary, 48 

 Oedogonium, 45, 46-48 

 Oenothera, eml)ryo sac, 387, 388 

 Olpidium, 109 

 Ontogeny, 1, 414 

 Oogonium, Albugo, 115 



Chara, 65, 66 



Coleochaete, 44 



Cutleria, 71 



Dictyota, 73 



Fucus, 82, 83 



Laminaria, 77 



Monoblepharis, 111 



Oedogonium, 47, 48 



Saprolegnia, 113 



Sphaeroplea, 55 



Vaucheria, 58, 59 



Zonaria, 75 

 Ooplasm, 115, 116 

 Operculum, Bryales, 203, 204 

 Ophioglossales, 261 



embryo, 269 



gametophyte, 267 



sporangium, 265 



sporophyte, 262 



summary, 270 



vascular anatomy, 263 

 Ophioglossum, 262 



antheridium, 268, 269 



archegonium, 269 



gametophyte, 268 



root, 264 



sporangium, 267 

 Opuntiales, 403 

 Orchidales, 408 

 Oscillatoria, 9 

 Osmunda, sporangium, 287 



stele, 282 

 Osmundaceaea, 276 

 Ovary, 362, 373, 381 



inferior, 376 



superior, 376 

 Ovule, 309, 312, 383 



anatropous, 383 



Anemone, 385, 386 



campylotropous, 383 



Cycadeoidea, 318 



development, 383 



Dioon, 329 



direction, 383 



