544 



INDEX 



Phloem, of Sunflower, 72 ; of Elm, 



95 ; of Pine, 242 ; of Fern, 297, 



&c. 



Phloem-parenchyma, 72, 95, 242 

 Phloem-sheath, 264, 295, 299, &c. 

 Phyllodadus, 230 

 Phyllode of Acacia, 134 

 Phytophthora, 496 

 Pileus, 455 



Piliferous layer, 150, 180 

 Pillwort, 319 

 Pilobolua, 499 

 Pilularia globulifera, 319 

 Pinnularia, 449 

 Pinus sylvestris, 229, &c. 

 Pit-membranes, 214, 238, 382 

 Pith, of Sunflower, 63, 75 ; of Elm, 



89 ; of Rosa or Rubus, 97 ; of 



Pine, 232 ; of Fern, 289 

 Pits, bordered, 237, 240, &c. 

 Pitted vessels, 74, 103 

 Plasmolysis, 31 

 Plerome, 112, 159, 184, 211 

 Pleurococcus, 440 

 Plugs in pollen-tubes, 208 

 Plumule, 211, 215 

 Poinsettia, glands of, 142 

 Pollen, 201, 253 



Pollen-grains, germination of, 202 

 Pollen-mother-cells, 203 

 Pollen-sacs, 200, 253 

 Pollen-tube, 202, 207, 256 

 Pollinodium, 488 

 Polyembryony, 258 

 Polyporus, 460 

 Polysiphonia, 379 

 Polytrichum, 341 

 Pores of Sphagnum, 258 

 Potamogeton, endosperm of, 213 

 Potash solution, 2, 29 ; clearing by, 



49 

 Potato, crystalloids of, 225 ; starch 



of, 44 



Preservation of material, 4 

 Primary root, 148 

 Primary tapetal layer, 203 

 Primordial utricle, 43 

 Primrose (Primula}, flower of, 190 

 Procambium, 81 

 Proembryo, 417 

 Promycelium, 463 



Prothallus of Fern, 30, 311 

 Protonema of Moss, 356 

 Protophloem, 295 

 Protoplasm, 26, 28 ; continuity of, 



213 ; movements of, 33 

 Protoxylem, 103, 182, 233, 297, 



299, &c. 



Prunus, glands of, 142 

 Prunus Padus, flowers of, 189 

 Pseudopodium, 359 

 Pteridophyta, 261, &c. 

 Pteris, stem, 298 

 Ptilota, 385 

 Puccinia, 462, &c. 

 Pulvinus, 123 



Punctum vegetationis, see Apex. 

 Pyrenoids, of Spirogyra, 444 ; of 



Closterium, 447 

 Pyrenomycetes, 481 

 Pythium, 491 



Radicle, 211, 215, &c. 



Rameuta, 287 



Ranunculus, flower of, 187 



Raphe, 205 



Raphides, 178 



Ray-florets, 191 



Razor, 8 



Reagents, 2, and Appendix A. 



Reduced vascular bundles, of Hip- 



puris, 110; of Elodea, 171 

 Reproductive organs, of Angio- 



sperms, 187 ; of Gymnospenns, 



252 



Resin, reactions of, 65 

 Resin-passages, 65, 233, &c. 

 Resting conidia, 493 

 Rhizines, 473 

 Rhizogenic cells, 304 

 Ehizoids, 341, 361, &c. 

 Rhizome, of Pteris, 298 ; of Pilu- 

 laria, 319 



Rhizophores, 262, 267 

 Rhododendron, style and stigma of, 



208 



Riccia, 62 

 Ricinus, aleurone-grains of, 223 ; 



endosperm of, 216 ; seed of, 73 ; 



seedlings of, 226 ; interfascicular 



cambium of, 79 



