U22 



BOTANY 



Nourishment, see Nutrition 



Nucellus, *279, 430, 431, *456 



Nuclear cavity, 56 ; division, 60 



Nuclein, 54, 202 



Nucleoli, 56, 62 



Nucleus, *48 



Nuphar, 514 ; idioblast, *108 



Nut, structure of, 459 



Nutations, see Autonomic movements 



Nutmeg, 515 



Nutrition, 159, 171 ; special processes, 206 



Mix, 57 4 



Nyctaginaceae, 509 ; thickening, 137 



Nyctitropic movements, 270 



Nymphaea, 236, 514, *515 



JVymphaeaceae, 514, 515 ; idioblasts, *108 



Oak, Quercus 



Oats, Avena 



Obdiplostemonous androscia, 452 



Ochrea, 32 



Ochrolechia, 379 



Ocimum basilicuvi, 587 



Oedogonium, *324 



Oenanthe, 547, 550 



Oenothera, 563 



Oiditim, 353 



Oil, ethereal, 72, 73 ; seed, Qamelina sativa 



-ducts, 88 

 Oleander, JYerium oleander 

 Oleum Aurantii florum, 535 ; Cacao, 529 ; 

 cadinum, 442 ; Cocos, 473 ; Crotonis, 

 543; Macidis, 515; Menthae Piperitae, 

 587 ; Olivae, 574 ; Pini pumilionis, 

 443 ; Ricini, 543 ; Rosae, 556 ; 

 Rosmarini, 587 ; Santali, 566 

 Oligotaxy, 452 

 Olive, Olea 

 Onagraceae, *563 

 Onion, Allium Oepa 

 Onobrychis, 294, 561 

 Ononis, 561, 562 

 Ontogeny, 44, 147 

 Oogamy, 302, 318 

 Oogonia, 319 

 Oomtjcetes, 341, 347 

 Oospheres, 302, 318 

 Oospore, 302 

 Ophioglossaceae, 404, 405 

 Ophrys, 489 

 Opium, 206, 522 

 Optimum temperature, 163, 234 

 Opuntia, *526, 527 ; twig, *25 

 Opuntinae, 526 

 Orache, Atriplex 

 Orange, Citrus 



root, Hydrastis canadensis 

 Orchidaceae, *487 ; roots, 42, 43 ; tubers, 

 *43, 113, 195 ; siliceous bodies, 72 ; 

 mucilaginous matter, 73 ; idioblasts, 

 83 ; velamen, 100 



Orchil, 378; saprophytic, 210; torsion, 258 



Orchis,- *i88, *489 ; ovule, *455 



Organic acids, 72, 74 



Organs, development of, 224, 237 



Orientation, movements of protoplasm, 

 244 ; torsion, 258 



Origanum, 587 



Ornithogalum, *466 ; cells, *76, 81 



Ornithophilous plants, 284 



Orobanche, 584 ; haustoria, 209 



Orris-root, Iris 



Orseille, see Orchil 



Orthogonal trajectories, 150 



Orffwploceae, 519 



Orthospermeae, 549 



Orthostiehies, 39, 40 



Orthotropie, 250 



Oryza, 480, *481 ; starch, 69, 70 



Oryzeae, 480 



Oscillaria, *307 ; movement, 244 

 Osmotic forces, 187 



Osmunda, *404 



Ostrich Fern, Struthiopteris 



Ovary, *448, *450 



Ovules, *430 



Oxalate of potassium, 202 ; calcium, 81, 



202 

 Oxalic acid, 202 

 Oxalidaceae, 532 ; roots, 195 

 Oxalis, 532 ; acids, 74 ; movements, 269 

 Oxygen in plants, 171, 173, 200, 237 



Paeonia, »428, 511 ; flowers, 33 ; amy- 

 loid, 81 

 Palaquium, 569 

 Palea, 402' 



Palisade parenchyma, 14, *78 ; cells, 115 

 Palmae, 471 ; flowers, *463 ; leaves, 31 ; 



root-thorns, 43 ; siliceous bodies, 72 ; 



endosperm, 81 ; wax, 91 ; thickening, 



120 ; stability, 164 

 Palmate leaves, 30, 31 

 Palmella stage, Algae, 318 

 Palm wine, 185 

 Pandanaceae, 475 

 Pandanus, leaf, 38 ; adventitious roots, 



43 ; seed, 294 

 l'aniceae, 480 

 Panicle, *461 

 Panicum, 480 

 Pansy, Viola 

 Papaver, *521, 522 ; uniaxial, 27 ; leaf, 



30 ; bundles, 117 

 Papaveraceae, 521, 522 ; latex vessels, 84 

 Papaw, Carica Papaya 

 Papilionaceae, 559 ; leaf tendrils, 35 ; 



wood, 137 

 Papillae, 95, *96 

 Pappus, 596 ; hairs, 248 

 Papyrus, 478 

 Parallel veined leaves, 30 



