INDEX. 



283 



Sphuguum-bogs, 20S. 



Sphagnum-moors, 188. 



Spine?. 14C. -204. 



Spiivig\ra, 110. 



Spongy tissue. 39, Jfi. 



Spore ease, 55. 118, 119. 



Spore-dispersal, lO'J. Ill, 112, 113, 



114. 118 

 Spiaes. lO'J. 110, 111. 112. 

 Spring beauty. 19G. 

 Spring plants, 143, m. 

 Squash seedlings, 50. 

 Scpiirting cucumber. 120. 

 ^taghoru fern, 100. 

 Stainen~, ;^', 75. SO. 125. 

 Starch, 153. 

 Mar cucumber, 61. 

 Star of-Bi-thlehem, 81. 

 Stem. .j4. 88. 139. 

 Steppes, 216, 253. 

 Stigma. SO. 125. 

 Stipules. 35. 

 Stoniata. SS. Jfi, 206. 

 Strawberry plant, j;, 58, 93. 

 Struggle for existence, 142, 

 Style, SO. 125. 

 Subterranean stems, 54, 55, 56. 76, 



77, 7S. 

 Succulent plants, 251. 

 Sugar. 153. 

 Sunde\y, 15S, 159. 

 Sunflowt-r, T2. 

 Swamp-forest, 190, 191. 

 Swampi-ninors. 187. 

 Swamp-thickets, 188. 

 Swampis. 183. 



Tamarack, 178, 190. 



Tap root. 93. 



Taxus, 4-'. 



18 



Teasel, 136. 



Telegraph plant, 49. 



Temperature, 145. 



Tendrils, 61. 62, 63. 



Thallus, 107. 



Thickets, l'^8. 224. 239. 



Thistle, 117. 



Thorns, 146, 20Jf. 205. 206, 207, 



224. 

 Thuja, ISO. 

 Tilia, 116. 201. 

 Tillandsia, 06. 101. 

 Toad -flax, 80. 

 ToaJstonh, 149. 

 Tobacco, SO. 

 Touch-me-not, 119. 

 Tragacanth, 206. 

 Transpiration, 31, 33, 154. 193, 



248, 

 Tropical forest. 2Jf5. 

 Trumpet creejier, 99. 

 Tubers, 74. 76. 196. 

 Tumbleweeds. 117. 220. 

 Turf-building. 185. 



U 



Ulex, SOS. 

 Ulothrix, 109, 111. 

 Utricularia, 173, 174. 



Y 



Yallisneria, 1S4- 



Vascular bundles, 83, 84, 92, 



94, 107, lOS. 151, 171. 

 Tegetatiye multiplication. 109. 

 Veins, 35. 36. 37. 40. 151. 

 Velamen, 99, 

 Venation, 35. 36. 37. 

 Victoria. ISO. 

 Violet, 117, 119. 



