INDEX 



345 



Pome, 263. 



Pondwee'ds, 237. 



Poplars, 255. 



Popowia, 198. 



Poppy, 261. 



Poppy family: see Papaveracea?. 



Populus, 256. 



Pore-fungus, 72. 



Potamogeton, 237, 238. 



Potato : see Solanum. 



Potentilla, 225, 262. 



Proteid, 302. 



Prothallium, 130, 132, 134. 



Protococcus forms, 22. 



Protonema, 95, 98. . 



Protoplasm, 7. 



Prunus, 213, 262. 



Pseudomonas, 76. 



Pseudopodium, 105, 123, 124. 



Pteridophytes, 2, 128, 172, 291. 



Pteris, 133, 134, 135, 137, 141, 142, 



143, 145, 281, 291, 292, 293. 

 Ptilota, 42. 



Puccinia, 63, 64, 65, 66. 

 Puff-balls, 68, 74. 

 Pulvinus, 308. 



Quillwort : see Isoetes. 



R 



Rabdonia, 41. 

 Radiate bundle, 294. 

 Radicle, 209. 

 Radish, 120. 



Ragweed: see Ambrosia. 

 Ranunculaceae, 261. 

 Ranunculus, 222, 259. 

 Raspberry : see Rubus. 

 Rays, 275, 276. 

 Receptacle, 222. 

 Red algae, 6, 38. 



Redbud : see Cercis. 



Redwood: see Sequoia. 



Reproduction, 3, 8, 309. 



Respiration, 302. 



Rheotropism, :!<>?. 



Rhizoid, 109, 110, 134. 



Rhizophores, 164. 



Rhododendron, 270, 271. 



Rhodophycea>, 6, 38. 



Riccia, 104, 110. 



Ricciocarpus, 110. 



Ricinus. 288. 



Robinia, 265. 



Root, 138, 217, 293, 294, 313. 



Root-cap, 293. 



Root-fungus, 87, 88. 



Root-hairs, 217, 300. 



Root-pressure, 300. 



Root-tubercles, 89. 



Rosaceae, 262. 



Rose family: see Rosaceae. 



Rosin-weed: see Silphium. 



Rosmarinus, 275. 



Royal fern : see Osmunda. 



Rubus, 262. 



Rumex, 284. 



Rust, 62, 63, 64, 65, 66. 



S 



Sac-fungi, 57. 

 Sage : see Salvia. 

 Sage-brush: see Artemisia. 

 Sagittaria, 208, 338. 

 Salix, 219, 233, 256, 257. 

 Salvia, 275. 

 Salvinia, 158. 

 Saprolegnia, 51, 52. 

 Saprophyte, 48, 84. 

 Sap-wood, 289. 

 Sargassum. 35, 36. 

 Saururus, 219, 258. 

 Scales, 161. 



