INDEX 



449 



; c~ digestive juices, 149, 150; of 

 sugar, 148, 149 : of water, 

 , .144-8. 



Secretory canals, 152, 339 (fig.), 

 340, 341, 342 (fig.), 344 (fig.) J 



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



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



hairs, 105 (fig.), IO 6, 

 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. spectabile, 



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-), 35 2 ,' of Ferns, 294, 304 

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



Seeds, 332, 333 ; dispersal of, 46, 

 5? I0 3, 353, 372; food- 

 ^^eserves 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 ; of Taxus, 346 (fig.). 



Segments (of growing point), 16 

 (fig.), 17 (fig.), 18, 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 ; S. spinosa, 316, 

 317 (fig.) ; S. 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.) ; MUCOY, 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, loo, 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- 

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



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

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

 Sieve plates, compound, 130; of 



Angiospenns, 28, 29 (fig.), 78 



