INDEX 



315 



Root-stock (see " Rhizome ") . 

 Root-tubercles (of Leguminosae) , 280 

 Rose mildew (Sphaerotheca) , 91. 

 Rotation of protoplasm, 61. 

 Royal-fern (Osmunda regalis), 134. 

 Rubiaceae, 215, 218. 

 Ruby-throat humming-bird, 249. 

 Rudbeckia, 241. 

 Rushes (Juncaceae), 189. 

 Rusts (^Ecidiomycetes), 88, 89, 94, 



95, Fig. 23. 

 Rye, 93. 



Sac-fungi (Ascomycetes) , 90, 91, 92, 



280, Fig. 24. 



Sage (Salvia) , 249, 254, Fig. 57. 

 Sage-brush (Artemisia), 204, 237. 

 Sagittaria, 185, 186, 207, Fig. 45. 

 Sago-palm (see " Cycas revoluta"). 

 Sahara, 271. 

 St. Helena, 234. 

 Salicornia, 275. 

 Salvia, 253, 254; S. pratensis, 254; 



Fig. 57. 



Salvinia, Salviuiaceae, 151, 155. 

 Samphire (see "Salicornia"). 

 Sanguinaria, 200, Fig. 48. 

 Saprolegnia, Saprolegniaceae (see 



also "Water-moulds"), 82, 83, 



Fig. 21. 

 Saprophyte, 30, 80, 82, 87, 92, 99, 196, 



203, 205, 278, 279, 297. 

 Sarcodes, 205, 279. 

 Sargassum (see also "Gulf-weed "), 



67, 69, 70, Fig. 18. 

 Sarothamnus, 250, 252, Fig. 56. 

 Sarracenia, 258; S. purpurea, 258, 



Fig. 58. 

 Sassafras, 230. 



Scale-mosses (see "Liverworts"). 

 Scales, 125, 165, 170, 195, 270, 277, 



279 ; epidermal scales, 125, 195, 277 ; 



leaf-scales, 105, 170, 270, 279, Fig. 



59. 



Schizomycetes (see also "Bacte- 

 ria"), 35. 

 Schizophyceae (see also "Cyanophy- 



ceae"), 35, 36,45, 284. 



j Schizophytes, Schizophyta, 34, 35 

 37, 44, 47, 284. 



Scitamineae, 192, 193, 194, 197, 198, 

 Fig. 47. 



Scouring-rush (Equisetum), 139. 



Screw-pine (Pandanus), 186, 198, 228, 

 268. 



Scrophulariaceae, 214. 



Sea-anemone, 25. 



Sea-rocket (Cakile), 275. 



Sea-urchin, 70. 



Sea-weeds (see also "Marine Al- 

 gae"), 20, 63, 64, 287. 



Secondary growth of stems, 142, 147, 

 162, 168, 172, 191, 200, 268. 



Sedges (see also " Cyperaceae "), 188, 

 189. 



Seed, 18, 29, 160, 165, 170, 171, 172, 

 183, 200, 243, 244, 245. 



Seed-plants (see also " Flowering 

 plants," "Spermatophytes "), 9, 

 10, 14, 16, 21, 23, 28, 30, 156, 158, 

 160, 161, 174, 226, 242, 267. 



Seed-vessel, 29. 



Selaginella, Selaginellaceae, 143, 144, 

 145, 146, 148, 150, 152, 155, 158, 159, 

 163, 169, 171, 175, 225, 226 ; embryo, 

 145 ; gametophyte, 145, 146 ; sporo- 

 phyte, 146; S. lepidophylla, 273; 

 Fig. 38. 



Self-pollinated flowers, 246, 253. 



Sensitive fern (Onoclea sensibilis), 

 237. 



Sensitive plant (Mimosa pudica), 24, 

 240, 283. 



Sepal, 161, 177, 179, 185, 186, 202, 

 206, 207, 208, 209, 211, 213, 218, 246, 

 248, 251. 



Sequoia (see also " Giant Tree," 

 "Redwood"), 167, 174, 227, 230, 

 235, 239; S. gigantea, 174, 227; 

 S. sempervirens, 174, 227. 



Seta, 116, 120, 124. 



Sexual cells, 25, 27, 287. 



Sexual organs, 28, 53, 63, 73, 74, 83, 

 106, 108, 116, 128. 



Sexual reproduction, 25, 41, 44, 52, 

 58, 60, 62, 63, 70, 73, 83, 84, 85, 87, 

 88, 106, 108, 116, 128, 160, 287; in 



