INDEX 



439 



Nitzschia, 207 (li.t;.). 



Nodules ol Lcguminosx', etc, 267 



268. 

 Non-essential organs of flowers, 



354- 

 Non-reducing sugars, 47. 

 Non-vascular plants, 180 et set/. 

 Nosepiece (of microscope), 398. 

 Nostoc, 205, 206 (fig.). 259. 

 NucoUus of, Angiosperms, 357 (lig.), 



358 (fig.), 3.59, 365, 371, 37-i ; 



Conifers, 348, 349 (fig.), 350, 



353 ; Cycads. 325 (fig.), 320. 



327 (lig.) ; Lvgiiioptcns, 331, 



333 (fig.). 



Nuclear division, direct, 21 ; in- 

 direct, 20-25 (figs.) ; in .spore- 

 mother cells, 305-7 (fig.), 385; 

 in vegetative cells, 24, 25. 



Nuclear membrane, 3, 22, 24. 



Nuclear sap, 22. 



Nuclear spindle, 21 (lig.), 2^ (fig.), 

 306, 307 (fig.). 



Nuclei, 2 (fig.), 3, 4. 5 (hg.), 7 (fig.), 

 50 ; function of, 3, 385, 389 ; 

 fusion of, 184, 21Z, 234, 238, 



^45, ^47, -^Si, 30'J, 350. 3'''', 

 368, 389 ; and heredity, 389, 

 390. 

 Nuclei of, ascus, 245 ; Bacteria, 

 2O2 ; Cladophoya, 196 (fig.), 

 208 ; Cyanophyceae, 205, 210 ; 

 Fungi, 231 ; laticiferous ele- 

 ments, 153 ; CEdogonuiin, 208, 

 217 (fig.) ; Rust Fungi, 247 ; 

 spcrmatozoids, 277, 278 (fig.) ; 

 Vaiicheria, 198, 218 (fig.) ; 

 Yeast (Saccharomvces), 255, 



256 (fig.). 

 Nucleolus, 2 (fig.), 3, 21 (fig.), 11, 



24. 306. 



Nutrition, 40, 183, 188, 220 ; and 

 sex of Equisctum - prothalli, 

 313 ; in plants and animals 

 compared, 194 ; of embryos, 

 302, 320, 321, 320. 332, 351, 

 3C'7. 37°, 373 : °t Moss-sporo- 

 gonium, 284 ; of secondary 

 wood, 124, 



Nvtiiphcea, a 01, 356. 



Oak (Qiierciis), 130, 3G4, 391 ; bark 

 of, 60, 141 ; cork of. 140 ; 

 wood of, 28, 35 (fig.), 122, 128 



(fig). 

 Oat (Avena), 53 ; fungal diseases 



of, 241, 248 ; starch of, 43. 

 Obelia, 193. 



OhiDiic pnytulacoid':^,^ hairs of, 94 

 (fig.) ; secondary thickening 



of, 133. 



Objective, 398, 400. 



Ocular, 398. 



CEdogoiiimn, habitat of, 195 ; 

 sexual reproduction of, 217 

 (fig.), 220-23 (fig), ^^'i; 

 structure of, i()5, 197, 208, 217 

 (fig.) ; zoospores of, 216, 217 



(fig.). 



(Edogoiiium concateiinluin, 217 (fig.), 

 221 (fig.) ; O. diplaiidrum, 221 

 (fig.) ; O. laiuhboruiighi, 221 

 (fig.); O. pachvaiidrium, 217 

 (fig.), 221 (fig.).^ 



CEttaiithe crocaia, stem-structure of, 

 86. 



Oinothcra, 389 ; 0. lainarchicnia, 

 mutation in, 381, 382. 



Oidium, 243. 



Oil-cake, 50. 



Oils, 40, 49, 50, 53, 155, 351 ; in 

 Fungi, 231 ; in oospores, 223; 

 in Vaucheria, 208 ; in zygo- 

 porcs. 185 ; reactions of, 49. 



Oils, volatile or ethereal, 62, 63, 64, 

 105, 106, 126, 151. 



Old Man's Beard (Usnea), 258 (fig.). 



Olea europiBa, 49. 



Oleander (Nerium oleander), leaf- 

 structure of , no, 161 (fig.), 162. 



Oleic acid, 49. 



Olive (Olea eiiropaa), 49. 



Olive oil, 49. 



One-sided bordered pits, 122. 



Onion {Allium ecpa), 45 ; cell- 

 structure of. I, 2 (fig.), 3, 

 26; epidermis of, 94 (fig.), 97 

 (fig.), 99 ; stamens of, 359 



(fig). 

 Oogamy, 220, 221 (fig.), 223, 226, 



234, 238. 

 Oogonium of, Cystopits, 233 (fig.), 

 234 ; Fiiciis, 221 (fig.), 224, 



225 (fig.) ; (Edogoiiium, 217 

 (fig.), 221 (fig.), 222 ; Pelvetia, 



226 ; Vattcheria, 221 (fig.), 224. 

 Oomycetes, 231-6 (figs.), 238, 406. 

 Oospore of, Algs, 221 (fig.), 223, 



224, 226 ; Angiosperms, 368 ; 

 Conifers, 350 ; Cycads, 326 ; 

 Ferns, 302 ; Fun,gi, 233 (fig.), 

 234, 230 ; I^iverworts and 

 Mosses, 281 ; Scliigiiiella, 319. 



Open grain of wood, 127. 



Opening of stomata, 98-100 (fig.). 



Opium, 61. 



