346 



INDEX 



Scapania, 116. 

 Schizomycetes, 21. 

 Schizophytes, 21. 

 Sclerenchyma, 281, 282, 284, 285, 



288, 290, 291. 

 Scouring rush, 159. 

 Scrophulariacea?, 275. 

 Scutellaria, 275. 

 Sedge family : see Cyperaceas. 

 Seed, 183, 184, 210, 811, 212, 214. 

 Selaginella, 162, 164. 165, 166, 168. 

 Sensitive fern : see Onoclea. 

 Sensitive-plant : see Acacia. 

 Sepal, 220, 221. 

 Sequoia, 189. 

 Seta, 98, 125. 

 Sex, 12. 



Sexual spore, 10. 

 Shepherd's purse : see Capsella. 

 Shield fern : see Aspidium. 

 Shoot, 312. 



Sieve vessels, 285, 286. 

 Silphium, 279. 

 Siphon forms, 27. 

 Siphonogams, 183. 

 Siphonogamy, 183. 

 Slime moulds, 74, 75. 

 Smut, 62. 



Snapdragon : see Antirrhinum. 

 Soil, 314. 

 Solanaceae, 275. 

 Solanum, 198, 275. 

 Solidago, 279. 

 Solomon's seal, 233. 

 Sorus, 136, 143, 144. 

 Spadix, 244, 245. 

 Spathe, 244, 245. 

 Sperm, 16, 100, 133, 135, 162, 166, 



169, 187, 190. 

 Spermatia, 43, 44. 

 Spermatophytes, 2, 171, 172. 

 Spermatozoid, 16. 



Sperm mother cell, 100. 



Sphagnum, 105, 106, 122, 123. 



Spike, 240. 



Spiraa, 262. 



Spiral, 193. 



Spirillum, 76. 



Spirogyra, 28, 29, 30. 



Spongy tissue, 142. 



Sporangium, 10, 136, 143, 145, 150, 



157, 163, 179. 

 Spore, 9. 

 Sporidium, 65. 

 Sporogenous tissue, 103. 

 Sporogonium, 98, 102, 104, 105, 106, 



125, 126. 



Sporophore, 49, 50. 

 Sporophyll, 145, 147, 148, 149, 174, 



176. 



Sporophyte, 97, 102, 137. 

 Spruce : see Picea. 

 Stability of form, 298. 

 Stamen, 174, 176, 196, 198, 219, 



220. 



Stele, 191, 283, 285. 

 Stem, 139, 282, 289, 291, 312. 

 Stemonitis, 75. 

 Stereome, 282, 299. 

 Sterile tissue, 103. 

 Sticta, 80. 

 Stigma, 199, 202. 

 Stomata, 141, 142, 191, 295, 301. 

 Strawberry: see Fragaria. 

 Strobilus, 160, 161, 163, 165, 174, 



175, 176, 193, 194. 

 Style, 199, 202. 

 Substratum, 49. 

 Sumach, 235. 



Sunflower : see Helianthus. 

 Suspensor, 167, 168, 183, 209, 



210. 



Symbiont, 79, 86. 

 Symbiosis, 79, 86. 



