INDEX 



449 



digestive juices, 149, 150 ; of 

 sugar, 148, 149 : of water, 

 144-8. 



Secretory canals, 152, 339 (fig.), 

 340, 341, 342 (fig.). 344 (fig-) I 



cavities, 63, 151, 152 (fig.) ; 



cells, 63, 130, 151, 328, 340 ; 



hairs, 105 (fig.), 106, 

 144, 145 (fig.), 149, 150 



(fig-)- 



Section-cutting, 405, 406. 

 Sedatives, 61. 

 Sedge (Car ex], 88. 

 Sedge-family (Cyperaceae), stoma 



of, 100. 

 Sedum, leaf of, 116, 166 ; stoma of, 



97 (fig.), 98. 

 Sedum album, 116; 5. spectdbile, 



97 (fig-)- 



Seed-coat, 352 (fig.), 370, 371 (fig.). 



Seed-plants, 322-73 (figs.). 



Seedlings, diseases of, 231, 235 

 (fig.) ; of Conifers, 337, 338 

 (fig.), 352 ; of Ferns, 294, 304 

 (fig.) ; of Selaginella, 320 (fig.). 



Seeds, 332, 333 ; dispersal of, 46, 

 50, 103, 353, 372 ; food- 

 reserves of, 40, 44, 45, 47, 49, 

 50, 150 ; of Angiosperms, 371-3 ; 

 of Conifers, 351, 352 (fig.) ; of 

 Cycads, 325 (fig.), 327 ; of 

 graft-hybrids, 389 ; of Lyginop- 

 teris, 331-3 (figs.) ; of parasites, 

 179, 37 2 I of Taxus, 346 (fig.). 



Segments (of growing point), 16 

 (fig.), 17 (fig.), 1 8, 195. 



Segregation of characters in hybrids 

 384-8, 390. 



Selaginella, 314, 321, 332, 373, 407 ; 

 anatomy of, 317, 318 ; arche- 

 gonia of, 319, 320 (fig.) ; cones 

 of, 318 (fig.) ; embryology of, 

 319, 320 (fig.) ; habit of, 316, 



317 (fig.) ; prothalli of, 319, 

 320 (fig.) ; spermatozoids of, 

 319, 320 (fig.) ; sporangia of, 



318 (fig.), 319. 



Selaginella kraussiana, 317 ; 5. 

 martensii, 317 (fig.) ; 5. rupes- 

 tris, 319; 5. spinosa, 316, 

 317 (fig.); 5. umbrosa, 318 



(fig-)- 



Selection, 378, 380, 390. 



Self-fertilisation, 224, 385 ; pol- 

 lination, 374; pruning, 142. 



Semiparasites, 144, 147. 



Semipermeable membranes, 8, 9 , 

 artificial -, 402, 403. 



29 



Sensitive Plant (Mimosa pudica], 

 pulvini of, 115, 116 (fig.). 



Sepals, 354, 373. 



Septa (of vessels), 28, 83, 120, 121. 



Septate wood-fibres, 121. 



Sequoia, cone of, 347, 352 (fig.). 



Serrated Wrack (Fucus serratus), 

 201 (fig.), 202. 



Seta (of sporogonium) of Liver- 

 worts, 282, 283 (fig.) ; of 

 Mosses, 284, 285 (fig.). 



Sewage, conversion of, 265. 



Sexual cells. See Egg, Gametes, 

 Spermatozoids. 



Sexual differentiation, 186, 212, 

 220, 227, 228. 



Sexual fusion, 184, 185 (fig.), 213 

 (fig.), 214, 219 (fig.), 237 (fig.). 

 See also Fertilisation. 



Sexual organs and reproduction, of 

 Algae, 184-6 (fig.), 188, 213, 

 214 (fig.), 220-28 (figs.), 269 ; 

 Angiosperms, 365, 366, 368 ; 

 Chlamydomonas, 184-6 (fig.) ; 

 Conifers, 348-51 (figs.); 

 Cycads, 326, 327 (fig.) ; Cys- 

 topus, 233 (fig.), 234 ; Equi- 

 setum, 313 ; Ferns, 301-3 

 (figs.) ; Fucus, 221 (fig.), 224-6 

 (fig.) ; Fungi, 233 (fig.), 234, 

 236, 237 (fig.), 238, 242, 

 244 (fig.), 245 ; Liverworts, 

 277 - 9 (fig.) ; Mucor, 237 

 (fig.), 238 ; Mosses, 279 (fig.) ; 

 (Edogonium, 221-3 (fig-) > 

 Selaginella, 319, 320 (fig.) ; 

 Ulothrix, 213 (fig.), 214 ; 

 Vaucheria, 221 (fig.), 223, 224. 



Sexual reproduction, 288, 289, 306, 

 307, 389, 390. 



Shade-leaves, 112; structure of, 91, 

 95, 96, 100, 168-70 (fig.), 295, 



379- 



She-Oak (Casuarina), stem-struc- 

 ture of, 162 (fig.). 



Sheath, bundle-, of Conifers, 343, 

 344 (fig.) ; of leaves, 107, 108 

 (fig) 112, 113; of stems, 85 

 (fig.), 86. 



Sheath of Blue-green Algae, 206 



(fig-)- 

 Shepherd's Purse (Capsella bursa- 



pastoris), embryology of, 368- 



70 (fig.) ; hairs of, 102 (fig.) ; 



White Rust of, 231, 233 (fig.). 

 Shingle beach, Lichens of, 258 (fig.). 

 Sieve plates, compound, 130 ; of 



Angiosperms, 28, 29 (fig.), 78 



