274 



INDEX. 



Stem, structure of, 52-64. 



Stigma, 144, 146. 



Stigma, structure of, 156, 157. 



Stinging hair, 129, 209. 



Stipules, 90. 



Stomata, 109, 110, 113, 114. 



Stone-fruit, 191, 193. 



Storage of food in the stem, 72, 73. 



Strawberry, 195. 



Struggle for existence, 197-205. 



Sugar, formed during germination, 



10. 

 Sundew, 104, 105. 

 Survival of the fittest, 211, 212. 

 Style, 146. 

 Sugar, 75, 70. 

 'Suture, 184, 187. 

 Sweet pea, flowers and fruit, 177, 



178. 

 Symmetrical, 143, 144. 



Transition from stamens to petals, 



152, 153. 

 Transpiration, 113-116. 

 Tree, 43. 

 Trillium, study of flower of, 137, 



138. 

 Trimorphous flowers, 173. 

 TropKolum leaves, starch in, 121. 

 Truncate, 86. 

 Trunk, 41, 42. 

 Tuber, 47. 



Tulip, study of flower of, 139, 140. 

 Twiners, 46. 

 Two-ranked, leaves forming two 



rows up and down the stem, as in 



grasses. 

 Types of flowerless plants, 219- 



245. 

 Types, order of appearance of, 



217. 



Tangential section, 56. 



Taper-pointed, 87. 



Taproot, 30. 



Tegmen, 5. 



Temperature, relation to germina- 

 tion, 7. 



Tendril, 46. 



Tendril climbers, 46. 



Terminal flowers, 136. 



Terminal bud, 81. 



Testa, 5. 



Thallophytes, 216. 



Thistle, Russian, 201, 202, 205. 



Three-ranked, leaves forming three 

 rows up and down the stem, as in 



Tickle-grass, 201. 



Tissue, 58. 



Tomato, study of, 182. 



Umbel, 132. 



Umbellet, 135. 



Underground stems, 46^8. 



Unicellular plants, 219, 220. 



Union of pistils, 147. 



Union of stamens, 147. 



Urns of mosses, 236. 



Urn-shaped, widened at the bottom, 

 with a narrower mouth, like the 

 corolla of the bearberry, Fig. 

 148, V. 



Vacuole, 227. 

 Variety, 214. 

 Vegetable physiology, 2. 

 Vein, 90. 

 Venation, 90, 91. 

 Ventral suture, 184. 

 Venus' flytrap, 106. 



