INDEX 



599 



Pond Scums, 425. 



Pondweeds, 530, 564. 



Poppy, 348. 



Pore Fungi, 474. 



Postelsia, 441 ; palmceformis, 441. 



Potamogelon crispus, 530. 



Potato, Blight, 437 ; Rot, 437. 



Powdery mildews, 455. 



Prairie, 583, 585. 



Pressure gauge on root, 226. 



Primrose, 289. 



Primulales, described, 554. 



Principes, 532. 



Procambium, 265. 



Procarp, 445. 



Progeotropic, 247. 



Projection of seeds, 364. 



Proliferations, 201, 367. 



Proliferous Pear, 201 ; Rose, 202. 



Promycelium, 464. 



Propulsion of water, 148. 



Protection, 261 ; of roots, 232. 



Protein, 104 ; composition, 27 ; as 

 food for man, 106 ; grains, 105 ; 

 kinds, 105 ; layers, 105 ; where 

 made, 27. 



Proteose, 105. 



Prothallus, 306, 493, 495. 



Protococcales, described, 416. 



Protonema, 484. 



Protoplasm, 30; alveolar structure, 

 38 ; appearance, 35, 36 ; character- 

 istics, 35 ; chemical composition, 

 38 ; composition, 106 ; constitu- 

 tion, 37 ; continuity, 40, 444 ; 

 definition, 8 ; organization, 40 ; 

 properties, 39; streaming, 37, 

 430, 432, 434 ; texture, 36. 



Protosiphon, 303. 



Protozoa, in soil fertility, 246; in 

 soils, 244. 



Pruning, 122, 370 ; uses, 206. 



Pseudomonas europcea, 406. 



Pteridophyta, described, 492. 



Pteridophytes, 11. 



Pteridosperms, 517. 



Ptomaines, 109. 



Puccinia graminis, 467. 



Puff ball, 87, 474, 475. 



Pyrenoids, 416, 425. 



Pyrenomycetes, described, 452. 



Pyronema, 450; confluans, ascocarp, 

 451. 



Pythium, 437. 



Quarantine, 407. 

 Quinine, 109. 



Raceme, 336 ; determinate, 336 ; 



indeterminate, 336. 

 Rafflesia, 84, 86, 268, 544, 578. 

 Rainbow Corn, 90. 

 Raised bogs, 486. 

 Ranales, described, 546. 

 Ranunculacece, 546. 

 Raoullia, 574. 

 Raphe, 274, 376. 

 Rattan Palm, 113, 184, 533, 575. 

 Receptacle, 193, 271, 275, 351, 



481. 

 Recessive, 311. 

 Red, Algae, 443, 564; Sea, 401; 



snow, 416. 

 Reduction division, 285, 446, 479, 



493. 

 Redwood, 113, 115, 523. 

 Reflex action, 55. 

 Regulation, 39. 

 Relationships of plants, 391. 

 Relative transpiration, 47. 

 Reproduction, 265 ; asexual, 298, 



299, 300; in Fern, 306; sexual, 



389. 

 Resin, 108. 

 Respiration, 111, 112, 266; amount, 



164; described, 162; in roots, 



231 ; vs. combustion, 165. 

 Respiratory ratio, 162 ; equation, 



165. 

 Respiroscope, 162, 163. 

 Resting period, 341, 377, 378; na- 

 ture, 379. 

 Resting spore, 397, 404. 

 Resurrection Plant, 505, 570. 

 Reversions, 201. 

 Rhamnales, described, 550. 

 Rhipsalis, 195. 

 Rhizoid, 215, 250, 478. 

 Rhizome, of Sedge, 187. 

 Rhizophore, 505. 

 Rhizopus nigrans, 438. 

 Rhodomela, 447 ; subfusca, 444. 

 Rhodophycece, described, 443. 

 Rhceadalcs, 546. 

 Riccia, 480. 



Ricdales, described, 480. 

 Rivularia, 400. 

 Rook, Formations, 586; pulverized, 



238. 



