INDEX. 



511 



Oxalate of lime. See calcium oxalate. 



Oxide of copper (ammoniacal). See 

 copper arnmon-oxide. 



Oxygen, relations with bacterial move- 

 ments, 282. 



PACKING cells (of lenticel), 184. 

 Pceonia, cultivation of pollen-tubes, 



392. 



Pseony. See Pceonia. 

 Palisade cells (or layer), 191 (fig. 76). 



dependence on light, 197 ; function 



of, 198. 



Palmellaceae, 263. 

 Pansy. See Viola tricolor. 

 Papaver Rhceas, structure of petals, 



199 ; pollen-tubes of, 392. 

 Papillae, 55, 56, 57, 339, 396. 

 Para-carmine, 249. 

 Paraffin, for embedding, 445. 

 Paraphyses, of Anaptychia, 337 ; Asco- 



bolus, 329 ; Funaria, 347 (fig. 125) ; 



Marchantia, 341 ; Mnium, 345, 



348 ; Morchella, 326 (fig. 117) ; 



Russula, 335 (fig. 119). 

 Parasite, on Mucor, 317 ; Pythium, 



321 ; Puccinia, 332. 

 Parenchyma, 104 ; spongy, 191. 

 dual value of, 194. 

 Parkes & Son's microscopes, xxii. 

 Parmelia ciliaris. See Anaptychia 



ciliaris. 

 Passage, intercellular, 102. 



cells (in bundle sheath), 167 (fig. 



67). 



Pasteur's fluid, 289. 

 Pathogenic bacteria, 286. 

 Pathological cork, 187 ; changes, 268. 

 Pea. See Pisum sativum. 

 Pear, sclerenchyma in, 65 (fig. 23) ; 



glucose in, 66. 

 Pectin, reaction with logwood, 64 ; 



with chlorzinc iodine, 382, 390. 

 Pectose mucilage, 429. 

 Pelargonium zonale. glandular hairs 



in, 97. 

 Pellicle (of bacteria), 266. See zoog- 



losa. 



Pellionia, chloroplasts in, 60. 

 Penicillium crustaceum, 323 (fig. 116). 

 Perchloride of iron. See iron. 

 Perianthium (of Marchantia}, 344. 

 Periblem, 211 (figs. 82, 83), 220 et seq. 



(fig. 87), 379 (fig. 139), 420. 

 Periblemic column, 223 (fig. 88). 

 Pericambium, 227. See pericycle. 

 Pericarp, 414, 418, 424. 

 Perichsetium, 345, 347. 

 Periclinal cell-walls, 211. 

 Pericycle, 102, 118, 126, 132, 165 ; 



interrupted, 220. 



See Stelar theory. 



pre- 



Periderrn, 183 (figs. 73, 74), 185, 187. 



Peridium, 331 (fig. 118). 



Perigynium (of Marchantia), 344. 



Periplasm (in Pythium), 323. 

 ! Peristome, 349, 353 (fig. 129). 

 ; Periwinkle. See Vinca. 



Permanent preparations. See 



parations. 

 , Peronosporese, 321 . See also Pythium. 



Petals, structure in Papaver Rhceas, 

 199 ; Verbascum nigrum, 198. 



vascular bundle ends, 199 ; origin 



of, in Brassica, 431. 



Petiole, structure of, in Ruta graveo- 

 lens, 193. 



Phseophyll. See phycophaein. 



Phajus, leucoplasts of, 58 (fig. 21). 



Phanerogamia, primary classification 

 of, 367. 



Phaseolus vnlgaris, starch of, 17 (fig 

 6). 



Phegopteris, spennatozoid of, 359 (fig 

 132). 



Phelloderm, 183, 187. 



Phellogen, 183 (figs. 73, 74). See also 

 cork. 



Phellogenic cortex. See phelloderm. 



Phellonic acid, 186. 



Phenol. See Carbolic acid. 



Phloem (bast), 104-5. See also vascu- 

 lar bundles. 



Phloeoterma, 175, 181. 



Phloroglucin, reagent for inuline, 69 ; 

 for lignin, 78, 134. See also Ap- 

 pendix III. 



Phcenix dactylifera, structure of en- 

 dosperm cell-walls, 73. 



Phosphate of lime. See lime. 



of soda. See soda. 

 Phycomycetes, 311, 318. 

 Phycophsein, 241. 



j Phyllotaxy, 367. 



j Phytophtlwra infestans, 318 (fig. 115). 



; Picea vulgaris, archegonia, 373 ; em- 

 bryo-sac, 372, 373; endosperm 

 (prothallium), 372, 373 ; fertilisa- 

 tion, 374 ; oosphere (corpuscu- 

 lum), 374 ; ovule, 372 (fig. 136) ; 

 seeds, 378 (fig. 139). 

 Picric acid, use of, 59, 112, 248, 262, 



263, 312. 



and corrosive sublimate as fix- 

 ing reagent, 60. 



' alcohol, reagent for chlorophyll, 

 248. 



aniline blue, use of, 111. See also 



Appendix III. 



nigrosine, use of, 111. 

 Picro-sulphuric acid, 302. 

 Pileus, 333. 

 Piliferous layer, 163. 

 Pilobolus crystallinus, 327. 



