442 



INDEX 



f'3. 1-9. 350 ; habit 

 335 (fiS-) ; leaf of. 



Picea cxcclsa 

 of. 334. 

 343- 



Pigments, 60, 64, 150 ; of Bacteria, 

 264 ; of chloroplasts, 109 ; of 

 corii, 137 ; of flowers, 63 ; of 

 Fungi, 231 ; of Hizmatococcus, 

 188; of heart-wood, 125, 126; 

 of Lichens, 261 ; of Seaweeds, 

 198, 199, 



Pihferous layer, 66, 67 (lig.), 69, 



1^. 77- 



Pimpernel, Yellow {Lvsiiiiachia 

 nemorum), stoma of, ii>o (li,;;.). 



Pimpinella anisiim, 62. 



Pine, Oregon (Pseudotsugii ilmtg- 

 lasii), 129 ; Pitch — {Piuiis 

 palustris), 129; Stone — (Piinis 

 Pinea), 352 (fig.). 



PiHgiiicula, glands of, 149, 150 (fig.). 



Pinus, archegonia of, 348, 349 (fig.) ; 

 economic importance of, 63, 

 129; embryology of, 350, 351 

 (fig.) ; female cones of, 345 

 (fig.). 346. 347 (fig.) ; fertilisa- 

 tion of, 350 ; habit of, 334, 

 335; leaf-structure of, 152, 166, 

 342-4(figs.) ; malecones of, 344, 

 345 (fig.), 347 (fig.) ; ovules of, 

 348, 349 (fig.) ; pollen of, 345, 

 347 (fig-). 351 (fig) ; polhna- 

 tion of, 348, 350 ; seeds of, 

 351. 35^ (fig.) ; seedlings of. 

 337. 338 (fig.) ; stem-structure 

 of. 338-41 (figs.) ; wood of, 

 37 (fig.). 340. 341 (fig)- 



Pintis mojwphvlla. 335 ; P. palus- 

 tyis, 129, 340; P. pinaster, 

 63 ; P. pinea, 332 (fig.) ; P. 

 strohus, 129, 335 ; P. sylvestris, 



37 (fig-). 1-^9. 15^. 166. 334 et 



seq. (figs.), 391. 

 Piper nigrum, 63. 

 Pit, simple, 30 (fig.), a, 121, T22, 



276; bordered, 33, 35 (fig.), 



36, 37, 68, 120, 293, 340. 341 



(fig.). 



Pit-canals, 33. 



Pit-membrane, 30 (fig.), 36, 



Pitch Pine {Piniis palustris) 



Pitcher-plant [Nepenthes), 

 of, 149. 



Pith of, petiole, 114; root 

 (lig.), 72, 00 ; stem 

 43, 4.5, 76, 77 (lig.). So 

 172, 173 (fig.), 323, 340. 



Pith-cavity, 80, 81 (fig.). 



Pitted vessels, 35 (fig.), 36, 



120. 

 129. 

 glands 



69, 

 19, 



30, 



Placenta of, Angiospcrms, 350, 3,59, 

 365 : Ferns, 295, 296, 298 (fig.). 



Plane (Plataiius), bark of, 141 ; 

 hairs of, 102, 103. 



Plankton, 192, 193 (fig.), 207, 210. 



Plantago laneeolata, 367. 



Plants, compared with animals, 

 14, 25, 181, 188, 193, 194, 

 -47. 307 : differences between 

 animals and, 188, 193, 194. 



Plasmatic membrane, 3, 4, 8, 9, 11, 

 12, 14. 



Plasmodiophura brassiecE, 251, 254 



(fi.g-). 

 Plasmodium (ol Slime-Fungi), 250. 

 Plasmolysis, false, 13, 14, 13 ; 



nature of, 9 ; true, 5 (fig), 8, 



II, 15- 

 Plasinnpora vitieoia, 243. 

 Plastids, 4, 25, 41, 50, 64. 

 Platvceriuni, 309. 

 Plerome, 19, 20, 89, 369. 

 Plenrococcus, i, 190-92 (fig.). 

 Pleurotcenium. 209 (fig.). 

 Pleurotus ostrealns, Plate II. 

 Plimmer, 54. 

 Plocamium, 204. 

 Plum (Prnniis), 93 ; Sih-cr-lcaf 



disease of [Stereitm purpuyeiim), 



250, 252. 

 Plumule of, Angiosperms, 369 (fig.), 



370. 371 (fig.). 37,^ ; Conifers, 



338 (fig.). 350. 351 (fig.) ; 



Cycads, 326. 



Pneumococcus, 263 (fig.). 



Podoearpus, 337. 



Poisonous plants, 48, 60, 61, 255. 



Poisons, and protoplasmic move- 

 ment, 4. 



Polar nuclei (of embrvo sac) 357 

 (fig.), 366, 367 (fig."), 36S. 



Polarised light and starch-grains, 



43. 



Poles (ol nuclear spindle), z^. 



PfjUarded trees, 142. 



Pollen mother-cells, 360 (fig.), 361. 



Pollen of, Angiosperms 350 361 

 362 (fig.): 307 (fi,g.), 373 ; 

 Conifers, 345, 348, 349, 351 

 (fig.) ; Cycads, 326 ; water- 

 plants, 301. 



Pollen-chamber, of Cvcads, 325 

 (fig.). ^2i^; of lA'guiol^teyis, 3^0, 



331. 33^. 333 (fig.)- 

 Pollen-sacs i^\ , Aii,L;i()SiH'rms t^^.i, 

 360-03 (tigs); Conifers, 343. 

 347 (fig) : Cycads, :^-^, "324 

 (fig-)- 



