208 



INDEX 



Scape, i6i- 



Scouring rush, 203. 



Scramblers, 129. 



Seed, 20, 163, 180; coatj 21. 



Selaginella, 204. 



Selection, natural, 8; artificial, 8. 



Sepal, 133, 169. 



Septicidal capsule, 166. 



Sessile, 77. 



Shelf fungus, 194. 



Shrub, 19. 



Sieve tubes, 66. 



Silicle, 167. 



SiHque, 167. 



Societies, 9. 



Soil, 40, 47, 



Soredia, 196. 



Sori, 177, 192, 



Spadix, 140. 



Spathe, 138, 140. 



S per mate phytes," iSo. 



Spike, 157. 



Spirogyra, 184. 



Sporangium, 177, 186, 188, 201, 203, 204. 



Spore, 176, 178, 181, 184. 



Sporophyll, 180, 201. 



Sporophyte, 177. 



Stamen, 135. 



Starch, 95, loi. 



Stem, 49; endogenous, 59; exogenous, 



61; kinds of, 49. 

 Stigma, i35j 144, i45- 

 Stipule, 76, 84. 

 Stock, 125. 

 Stomate, 87. 

 Stone fruit, 168. 

 Storage of food, 99. 

 Struggle to live, 4, 6. 

 Style, 135, 163. 

 Summer-spore, 191. 

 Sun energy, 95. 



Survival of fittest, 7. 

 Swarm-spores, 186. 

 Symbiosis, 196. 

 Syngenesious, 141. 



Teleutospores, 192, 

 Tendril, loi. 

 Thallophyte, 181, 184. 

 Thallus, 184, 197. 

 Thorns, loi. 

 Thyrse, 160. 

 Tillandsia, no. 

 Timber, decay of, 195. 

 Tissue, 60, 62. 

 Toadstool, 194. 

 Torus, 134, 169. 

 Tracheid, 65. 

 Transpiration, 98, 103. 

 Twiners, 129, 131. 



Umbel, 159. 

 Undergrowth, 12. 



Valve, 164. 

 Variation, :^. 

 Vaucheria, 186. 

 Verticellatc, 84. 



Water-pore, 88. 



Wheat rust, 192. 



White weed, or ox-eye daisy, 155. 



Whorled, 84. 



Willow mildew, 190. 



Wind travelers, 173. 



Woody fiber, 17. 



Wounds of plants, 56. 



Yeast plants, 190. 



Zygnema, 185. 

 Zygospore, 185, 189. 



