444 



INDEX 



Conifers, 348, 349 (fig.) ; 

 Cycads, 325 (fig.), 326, 327 

 (fig.) ; Equisetum, 313 ; Ferns, 

 299 (fi,g.), 300^302 (fig.), 304, 

 3°5. 313 i Lycopodiiim, 316 

 (fig.) ; Lyginopteris, 330, 331 ; 

 Selagliiella, 319, 320 (fig.), 321. 



Protococcus (Hcematococcus), 186. 



Protonema, 287 (fig.), 288. 



Protophloem, 90. 



Protoplasm, 2, 3 ; composition of, 

 2, 50 ; growtli of. 25 ; move- 

 ment of, 4, 6 ; permeability 

 of, 9, 12, 13, 15 ; properties 

 and structure of, 3, 4. 



Protoplasmic connections, 24, 30, 

 190. 



Protoplast, 2, 3. 



Protoxylem, 36, 68, 89 ; of Cycads, 

 322 ; of Ferns, 292 (fig.). 293 ; 

 of leaf, 112, 114 ; of Lvgiiiop- 

 teris, 328 ; of root, 66 (fig.), 68, 

 69, 70 (fig.), 318, 341 ; of stem, 

 78 (fig.), 79, 80 (fig.). 81 (fig.), 

 83 (fig.), 84 (fig.), 85 (fig.), 86, 

 118 (fig.). 



Protoxylem canal. 85 (fig.), 86. 



Prussic acid. 48 ; and enz3.-mc- 

 action, 56. 



Psamina arenayia, leaf-structure of, 

 92, 163, 164 (fig.). 



Pseudomonas, 262, 263 (fig.). 



Pseudotsuga douglasii, 128, 

 cone of. 352 (fig), 353. 



Psilopfiytales, 407. 



Psiloium, 407. 



Psychotria ipecacuanha, 61. 



Pteridophyta, 289-321 (figs.; 



334. 355, 370, 373, 407- 

 Pteridosperms, 327-33 (figs.) 



407. 

 Pteris aquiliiia, extrafloral 



taries of, 148, 149 (fi 



of, 289, 290 (fig.) 



112, 169, 291, 295 



290 (fig.), 292-4 



of, 296 (fig.). 

 Ptomaines, hi. 

 Pnccinia anemones, 247, 248 ; P. 



graminis, 245-7 (^g,) '• P' "'"'- 



vacearum, 248, 253. 

 Puff-ball (Lycoperdon), 245, 250. 



251 (fig.), 407. 

 PuUing-strains, resistance to, in 



aquatics, 88, 170 ; in roots, 72. 

 Pulses, 43. 

 Pulvinus, structure of, 115, 116 



CI?.)- 



129; 



333, 

 334, 



nec- 



habit 



leaf of. 60, 



rhizome of, 



(figs,) ; sori 



Pure cultures (of Bacteria), 264 ; 

 -~ Unes, 377, 378. 



Purine-dcrivatives, 61. 



Purple Dead-nettle {Lamium pur- 

 piireum), 364 ; — Loosestrife 

 (Lythntm salicaria), ij^. 



Putrefaction, 265. 



Pvrenoids. 7 (fig.), 8, 181, 182 (fig.), 

 187 (fig.). 196 (fig.), 207, 208, 

 209 (fig.), 217 (fig,), 227 (fig.). 



Pyrenomycetes, 407. 



PvtJiium debaryanum, 231, 252, 

 253, 406 ; structure and life- 

 history of, 234, 235 (fig,), 236. 



Qualitative variations, 374, 375 



(fig.), 376 (tig.). 

 Quantitative variations, 374, 

 Querciis, 130, 364 ; bark of. 60, 



141 ; cork of, 140 ; wood of, 



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

 Quei'cus intermedia, 389 ; Q. suber, 



140. 

 OuiHaia-\>cir\i, 48. 

 Quillwort [Isoeies Jacustris), 314, 



315 (fig.). 

 Quinine, 61. 



Radiation, prevention of, 138. 



Radicle of, Angiosperms, 369 (fig.), 

 37°, 37^ (fig.) ; Conifers, 350, 

 351 (fig.). 35^ (fig.) ; Cycads, 

 326 ; Selaginella, 320 (fig,). 



Raffia-tape, 34. 



Rainfall and plant-distribution. 391. 



Raising of stomata, go, 160 (fig,), 

 161, 162, 170. 



Ramentum (of Ferns), 291 (fig.). 



Rancidity of butter, cause of, 265. 



Ranunculacefe, 60, 354, 357. 



Ranunculus aqnatilis, 177 (fig.) ; 

 R. auyicomus, 92 (fig.) ; R. 

 repens, 66. 



Raphe (of anatropous ovules), 357 

 (fi.?.). 35S (fi,g.). 



Rapliio, 3t. 



Raphides, 58, 39 (fig.). 



Rattle, Yellow' (Riiinauthus), hyd- 

 athodes of. 144, 145 (fig.). 



Rays, of Conifers. 340, 341 (fig.) ; 

 of Lyginopteris, 328, 330 (fig.) ; 

 of root. 132 ; of secondary 

 phloem, 130 ; of sccondarv 

 wood, 119 (fig,), 120, 122-4 

 (fig,), 128 (fig,) ; primary — , 

 76, 77 (fig.), 78 (fig.), iis: 



Reactions of, alkaloids, 61 ; cal- 

 lose, 82 ; cellulose, 4, 31. 32 ; 



