Index. 



435 



tlon of, 84 ; nature of, 33 ; as reservoir for 



water, 34, 

 Solanum jasminoides, 137, 142. 

 Soldanellas, 812, 818. 

 Solomon's seal, 72 ; diagram of flower of, 



206. 

 Sorus, 288. 

 Spadtx, 219. 

 Spathe, 219. 

 Species, 360. 

 Sperm, 164, 167. 



Spermatophytes, asexual and sexual genera- 

 tions of, 294, 297, 299 ; studies of selected, 



218. 

 Sphinx moth, 182 ; and Datura flower, 188. 

 Spike, 158. 

 Spirodela, 40. 



Spirogyra, 264 ; reproduction of, 272. 

 Spongy parenchyma, 88. 

 Spontaneous movements, 129. 

 Sporangia, 202. 

 Sporophyll, 202, 203, 300. 

 Sporophyte, 294-300; of moss, 289, 291. 

 Sprengel, 171. 

 Spurge, 207. 

 Squash, tendrils of, 103. 

 Squirting cucumber, 211. 

 Staining paraffin sections, 388. 

 Stamen, 165. 

 Stamens, 201. 

 Staminate, 175. 

 Standard, 287. 

 Starch, 96; formation of, 87; sheath, 49; 



test for, 12. 

 Stele, 49. 

 Stem, chief function of, 55 ; diagram of, 58 ; 



summary of functions of, 60. 

 Stems, characterization of, 74; ftinctions of, 



72 ; habits of, 73 ; modified, 139. 

 Stigma, 165. 

 Stigmatic chamber, 193. 

 Stigmatic disk, 192. 

 Stimulus, transmission of, 126. 

 Stomata, 86 ; action of, 94 ; determination of 



necessity of, SO. 

 Strawberry, 207. 

 Streaming of protoplasm, 103. 

 Strengthening elements, 56. 

 Study, method of, 1. 

 Style, 165. 



Sugar, grape, test for, 12. 

 Sumac, 207. 

 Sundew, 128. 



Sunflower, heliotropism of, 121. 

 Superior pistC, 204, 205. 

 Sweet alyssum, 147. 

 SyngenesiouB stamens, 155. 



Tabemeemontana dichotama, 838. 



Tables for laboratory, 371. 



Taraxacum ofhciuale, 248. 



Taxodium, 138. 



Taxus, 183. 



Tecoma radicans, 65. 



Teleutospores, 280. 



Temperate regions, light in, 342 ; rainfall of, 

 888, 840 ; temperature of, 838, 340 ; vege- 

 tation in, 838. 



Temperature, 310. 



Terminal buds, 70. 



Testa, 6. 



Theophrastus, 171. 



TUlandsia usneoides, 340, 841. 



Timber line, 348, 349. 



Toadstools, 281. 



Touch-me-not, 211. 



Tracheal tubes, 67 ; diagram of, 58. 



Tradescantia, study of haii-s of, 100, 103. 



Translocation, diagram to show, 99. 



Transpiration, 91. 



Transplanting, time for, 33. 



Transporting forces, 60. 



Tree claims, 329, 380. 



Triassic plants, 054. 



Trimorphio, 176. 



Triteleia, 147. 



Tropical forest, 836. 



Tropics, mean temperature of, 381 ; rainfall 

 of, 331 ; vegetation in, 331, 834. 



Trumpet creeper, 65, 103, 138, 218 ; clinging 

 roots of, 43. 



Tubercles on roots, 38. 



Tubular corolla, 165. 



Tulip, 122, 223. 



Twining, method of, 180; benefit of, 131. 



Twining plants, 130. 



Ulothrix zonata, 162. 

 Umbel, 159. 

 TTredospores, 280. 

 Utricularia, 134, 186, 145. 



Vallisneria, 179, 180. 



Variation, cause of, 360. 



Varieties, 361. 



Vascular bundle, 49 ; diagram of, 49 ; func 



tion of, 51 ; position of, in leaves, 88. 

 Yauchcria, 264, 273. 

 Vega expedition, 810. 

 Venus's flytrap, 127. 

 Vexillum, 237. 

 Viola, 2-39-247. 

 Violet, 154, 180, 207. 



