INDEX SECOND. 



Soils, effects of much manure on them, 223. 



their character known by the plants growing on them, 224. 



a correct knowledge of them difficult to be obtained, 225. 



method of analysing them, 226. 



Sphagnum obtttsifoliuw, structure of its leaf, 551. 

 Spiral vessels are not found in old wood, 360. 



their characters, 83. 



contract and dilate, 361. 



have been considered bronchiae, 363. 



Mr. Knight's opinions respecting them, 864. 



Sprengel, his remarks on the leaf of Sphagnum, 551. 

 Stems, not present in all plants, 242. 



woody, their characters, 285. 



herbaceous, 286. 



structure of those which consist of a homogeneous mass, 291 



monocotyledonous, general structure of, 293. 



have no medullary rays, 302. 



solid, their structure, 294. 



- hollow, their structure, 300. 

 dicotyledonous, general structure of, 315. 



woody, structure of, 316. 



herbaceous, structure of, 413. 



ligneous, not all perennial, 422. 



hollow herbaceous, structure of, 423. 



Stem buds, when they are formed, 395. 



Stipe, structure of the, 304. 



Sucker, analogy to the leaf gem and the branch, 145. 



Syringa vulgaris, anatomy of its leaf, 575. 



Systematic Botany, definition of, 2. 



T. 



Temperature, effects of, on plants, 62. 

 Tendrils, structure of, 654. 



varieties of, 653. 



Thenardy bis experiments on the vegetable secretions, 1 2GV 



Theophrastus, his knowledge of Botany, 7. 



Thutmnigt his theory of the use of the pith, 396. 



Toothwort, scales of, 145. 



Tournefort, his character as a Botanist, 12. 



Tradescantia virginica, structure of its stem, 299. 



. its lateral shoots, 309. 



Trees, increase very little in cold summers, 337. 



how to ascertain their age, 336. 



- are generally barked before they are felled, 337- 



German foresters object to barking them, 337. 



Treviramus noticed the interstitial cellular spaces, 591. 



his remarks on foliar transpiration, 618. 



Tubers belong to the stem rather than to the root, 148. 



are reservoirs of nutriment, 154. 



. formation of, 155. 



anatomy of, 159. 



their connexion with their offsets, 161. 



organization of, 162. 



gems on, how formed, 163. 



are hybernacula, 164. 



