406 



INDEX. 



Oospore, 276. 

 Opercutum, 333. 

 Orchis, 71. 

 Organic acids, 80. 

 Ovary, 129. 

 Ovule? 129, 379, 389. 

 Oxalic acid, 81. 

 Oxalis, 33, 81. 



Palisade Tissue, 118, 120. 

 Paraphyses, 283, 302, 311, 314, 



321, 330. 



Parasite, 115, 288. 

 Parmelia (Physcia, Xanthoria), 



309. 

 "Passage-cells" in Endodermis, 



114 ; in Exodermis, 115. 

 Pasteur Solution, 285. 

 Pea Flour, 42, 61. 

 Pea Seed and Seedling, 37, 38, 



44, 61. 

 Pellia, 316. 

 Penicillium, 297. 

 Pepsin, 47. 

 Peptones, 38, 41, 48. 

 Perception of Stimuli, 224. 

 Perception Time, 235. 

 Perianth-leaves, 125. 

 Pericarp, 138. 



Pericycle, 100, 113, 345, 376. 

 Periderm, 105. 

 Peristome, 333. 

 Petiole, 119. 

 Peziza, 315. 

 Phaselin, 37. 

 Phaseolus, 37, 136. 

 Phelloderm, 108, 109. 

 Phellogen, Development of, 107. 

 Phenylhydrazine Test, 54. 

 Phloem, 88, 96. 

 Phloroglucin, 68, 73. 

 Photosynthate, 169. 

 Photosynthesis, 168-188. 

 Photosynthometer, 177. 

 Phototropism, 222, 233. 

 Phy*cia (Parmelia, Xanthoria), 



309. 

 Phyllodes, 123. 



Piliferous Layer, 112. 



Pinus, 363. 



Placenta, 348. 



Plasmolysis, 156, 267. 



Pleurococcus, 263. 



Plumule, 65, 131, 135. 



Pollen-grains, 127, 378, 385 ; 



Sacs, 127, 377, 385, 389; 



Tubes, 128, 130, 381. 

 Polypeptides, 37, 38. 

 Polysaccharides, 53. 

 Portugal Laurel, 73. 

 Polamoyeton, Leaf of, 124. 

 Potato, 43, 58. 

 Potometer, 214. 

 Presentation Time, 235. 

 Preservation of Material, 9. 

 Procambial Strands, 101, 103. 

 Prolamins, 37. 

 Protein Grains, 44. 

 Proteins, 36, 44. 

 Proteoses, 38, 41, 48. 

 Prothallus, 351. 

 Protonema, 341. 

 Protophloem, 99. 

 Protoplasm, 27. 



Effects of Cold, 34, 35 

 Heat, 33. 



,, Injury, 33. 



,, ,, ,, Poisons, 33. 



Protoplast, 27. 



Protoxylem, 92, 99, 106, 113. 

 Psamma, Leaf of, 124. 

 Puccinia, 303. 

 Pulvinus, 246, 258, 260. 

 Pyrenoid, 261, 264. 

 Pythium, 288. 



Radicle, 65, 131, 135. 

 Ramenta, 342. 

 Razors, 12. 

 Reaction Time, 234. 

 Reagents, 8, 16 ; see Appendix. 

 Rectipetality (autotropism), 234. 

 Resin Passages, 96, 366. 

 Resins, 79. 

 Respiration, 189. 

 Respiratory Equation, 193. 



