314 



INDEX 



Promycelium, 89, Fig. 23. 



Pronuba, 257. 



Proteacese, 231. 



Protection against animals, 259, 260, 

 261, 272, 295. 



Proterandry, 250, 251. 



Proterogyny, 250. 



Prothallium (see " Gametophyte ")• 



Protoooocaceae, 42, 43, 44, 45, 46, 47, 

 48, 49, 50, 51, 57, 60, 76, 77, 78, 79, 

 98, Fig. 7. 



Protoooccus, 280. 



Protomyxa, 32. 



Protonema, 63, 114, 115, Fig. 29. 



Protophyte, Protophyta, 16, 37. 



Protoplasm, 3, 4, 22, 23, 61, 72. 



Psilotum, Psilotaceae, 144, 147, 153. 



Pteridophyta, Pteridophytes (see 

 also "Ferns"), 16, 120, 122, 123, 

 124, 125, 126, 128, 130, 132, 139, 143, 

 144, 147, 148, 149, 152, 153, 156, 157, 

 158, 159, 160, 161, 169, 172, 175, 176, 

 184, 196, 223, 225, 268, 273, 290, 291, 

 292, 293, 294 ; embryo of, 129, 130, 

 131 ; fossil P. , 154, 155 ; gameto- 

 phyte, 123, 12G, 127; heterospory, 

 148; sexual organs, 128, 129; spo- 

 rangium, 132; spores, 132; sporo- 

 phyte, 123, 124, 130, 131. 



Pteris aquilina, 136. 



Puff-ball (Lycoperdon), 87, 90, 93, 94. 



Pyrenoid, 39, 59, Figs. 6, 13. 



Pyrenomycetes, 93. 



Rafflesia, 279. 



Rag-weed (Ambrosia), 241. 



Rainfall (a factor in distribution), 



229, 237, 239. 

 Ranunculus, Ranunculacese, 186, 207, 



208, 217, 246, 247, 270 ; R. aborti- 



vus, 246; R. Calif ornieus, 246; 



R. Purshii, 270, Figs. 50, 59. 

 Rattan-palm, 278. ~~" 

 Ravenala, 193. 

 Ray flowers (of Compositse), 215, 



216. 

 Receptacle, 207. 



Red Algse (Rhodophyceae) , 49, 63, 



70, 72, 73, 74, 78, 79, 99, 222, 263, 



295, Figs. 19, 20. 

 Red-bud (Cercis) , ;212. 

 Red cedar (Juniperua Virginiana), 



89, 90. 

 Redwood (Sequoia sempervirens) , 



174, 227. 

 Reproduction, 3, 9, 25, 40, 41, 62, 55, 



58, 60, 62, 63, 65, 68, 69, 73, 78, 83, 

 104, 105, 264, 285. 



Respiration, 8, 24, 25. 

 Resting-spore (see also " Oospore," 

 "Zygospore"), 39, 41, 53, 54, 57, 



59, 60, 63, 264, 265; Chara, 63; 

 Confervacese, 53, 54; fresh-water 

 Algie, 264, 265 ; Fungi, 83, 85, 86 ; 

 Vaucheria, 57 ; Volvox, 41. 



Resurrection-plant (Selaginella lepi- 

 dophylla) , 273. 



Rhaphides, 260. 



Rhizoids, 86, 107, 126. 



Rhizome, 193, 264, 282. 



Rhododendron, 214, 240. 



Rhodophyceae (see also "Red Al- 

 gie ") , 49, 70, 72, 73, 74, 75, 78, 79; 

 color of, 71 ; continuity of proto- 

 plasm, 71; fresh-water R., 73; re- 

 production, 73, 74; Figs. 19, 20. 



Rhus (see " Sumach "). 



Riies speciosum, 249. 



Ricoia, 103, 106, 109, 110, 111, 118, 

 119, 122, Figs. 26, 27, 28, 33. 



Richardia, 246. 



Ricinus, 200, 209, Fig. 48. 



Rock-building Algae, 222. 



Rock-weed (Fuous), 69, 70, Fig. 18. 



Rocky Mountains, 232, 237. 



Root-hairs, 281. 



Roots, 21, 30, 67, 68, 69, 113, 120, 122, 

 126, 129, 130, 131, 141, 144, 145, 162, 

 170, 171, 172, 182, 183, 185, 189, 204, 

 259, 267, 268, 276, 277 ; of Conifers, 

 170, 171, 172; of Cycads, 162; of 

 Dicotyledons, 189, 204; of Epi- 

 phytes, 277; of Equisetura, 141 ; of 

 Ferns, 122, 126, 127, 130, 131 ; Lyco- 

 pods, 144, 145; Monocotyledons, 

 183, 185, 268. 



