542 



INDEX 



Sphaerotheca, 291. 



Sphagnales, 352. 



Sphagnum moors, 481. 



Spike, 150, 153, 374. 



Spikelet, 172, 173. 



Spirillum, 266, 268. 



Spirogyra, 105, 108, 232-239. 



Spirogyra, life history, 238. 



Sporangium, 273-276, 293, 330, 358, 



360, 397. 



Sporangiophore, 275. 

 Sporangium-fruit fungi, ,274. 

 Sporangium series, 273, 330. 

 Spore case, 144, 275, 330, 358, 360, 



375, 409- 



Spore plant, 354, 358, 367, 379. 

 Sporidium (a), 305-309, 315, 318. 

 Sporocarp, 246. 

 Sporodinia grandis, 279. 

 Sporogonium, 339, 340, 342, 343, 



345. 348, 35, 355- 

 Sporophore, 273, 274, 282, 284. 

 Sporophyll, 369, 371, 375-378, 390, 



397, 402, 406. 

 Sporophyte, 238, 244, 342, 354, 355, 



35 6 , 358, 3 6 7, 37, 37 1 * 376, 379, 

 382, 386, 402, 404, 405, 418, 419. 



Spruce, cones of, 387. 



Squash, n, 16, 213. 



Squash, fruit of, 213. 



Stag-horn fern, 368, 369. 



Stamens, 143, 147, 152, 153, 155, 

 158, 163, 165, 168, 171, 173, 181. 



Stamens, movement of, 192-194. 



Staminate cones, 390, 391. 



Staminate flowers, 145, 173, 178. 



Staminate inflorescence of corn, 



173- 



Starch, 20-23. 



Starch, corrosion of grains of, 22. 



Starch, formation, 104-113. 



Starch, grains of, 20-23. 



Starch, reserve, 21. 



Starch, transitory, 21. 



Starch grains, of corn, 22; of pota- 

 toes, 21; of pea, 23. 



Stem, function of, 44. 



Stem, climbing, 46; decumbent, 47; 

 erect, 45; prostrate, 47. 



Stems, elongation of, 26. 



Stems, kinds of, 45-54. 



Stems, types of, 44. 



Sterigma, 315, 323. 



Sterile, flower, 145, 170, 174. 



Stigma, 144, 152, 156, 160, 161, 163, 



166, 168, 169, 181, 182-, 409. 

 Stink horn fungi, 329, 330. 

 Stipe, 323. 



Stipule, 73, 77, 78, 81. 

 Stipule scar, 73. 

 Stolon, 47, 275, 358. 

 Stoloniferous, 48. 

 Stomates, 89-91, 99, 102, 119, 335, 



336, 345, 457, 479- 

 Stomates, number of, 102. 

 Stomium, 349, 361. 

 Stone fruits, 208-212. 

 Stoneworts, 248. 

 Stony tissue, 363. 

 Strangling roots, 34. 

 Strawberry, 47, 213, 436. 

 Streptococcus, 266, 268. 

 Strobilus, 377. 

 Stroma, 292, 293, 312. 

 Style, 144, 152, 156, 160, 163, 166, 



168, 169, 177, 181, 182, 409. 

 Subkingdom, 225, 230. 

 Subspecies, 226, 496. 

 Succory, 449. 

 Succulent stems, 52, 120. 

 Sucrose, 23. 

 Sugar, 22-24, I0 9- 

 Sugar, formation of, 104, 113. 

 Sugar cane, 428. 

 Sulphates, 114, 125. 

 Sulphur, 20, 114, 124, 125. 

 Sumac, shoots of, 74, 75. 

 Sundew, 95, 96. 

 Sunflower, 166-170, 191, 449. 

 Sunflower, pollen grains of, 182, 206. 

 Superior, 147. 

 Suspensor, 278, 396. 

 Swamp moors, 482. 

 Swarm spore, 241-243. 

 Sweet pea, 163-166, 209. 

 Sweet potato, 35. 

 Symbiont, 132. 

 Symbiosis, 129-132, 299, 454. 

 Sympetalous, 408. 

 Syncarpous, 408. 

 Synergids, 201, 412414. 

 Syngenesious, 168. 

 Synsepalous, 408. 

 Synthetic assimilation, 113. 

 Syringa, 446. 



Taka diastase, 133. 

 Talus, 459. 



