438 



INDEX 



Sweet-Pea, 29-30, 144, 147, 188- 

 90, (Fig. 131), 227, (Fig. 

 162), 235, 246. 



Sycamore, 11 2-14, (Figs. 70-1, 

 73), 117, 120, 122, 149, 214- 

 15, 222, 303-6, (Fig. 202), 



337- 

 Symbiosis, 355-6. 

 Sympetalae, 232, 248. 

 Symphoricarpus, 258. 

 Symphytum, 250. 

 Sympodial branching, 1 19-21. 

 Syncarpous, 17, 171. 

 Syngenesious, 178, 261. 

 Syringa, 311. 

 Systematic botany, 229-33. 



Tap roots, 12, 58, (Fig. 26). 

 Taraxacum, 380, 385. 

 Tare, 246, 378. 

 Tea-tree, 255. 

 Teasel, 261. 

 Temperature, effect on 



absorption, 123, 336. 



carbon-assimilation, 84. 



distribution, 315-17, 395, 397. 



germination, 34. 



transpiration, 95. 

 Tendrils, 30, 144-7, (Figs. 91-4, 



131), 341, (Fig. 220). 

 Testa or seed-coat, 21, 23, 24, 28, 



3i- 

 Teucrium, 254. 

 Thalictrum, 237. 



Thistle, 214, 222, 262, 343, 348, 

 361. 



Field, 379. 



Marsh, 376. 



Sow, 378, 379. 



Spear, 379. 

 Thorn-apple, 255. 

 Thyme, Wild, 252, 361, 370. 

 Thymus, 252. 

 Toadflax, Yellow, 256. 



Ivy-leaved, 256, 344. 

 Toadstool, Sulphur-tuft, 355, 



(Fig. 226). 

 Tobacco, 254. 

 Tomato, 218, 255. 

 Toothwort, 343, 359, (Fig. 229), 



360. 

 Tormentil, 243,244, 348, 369, 380. 

 Tragopogon, 379. 



Transpiration, 91-5. 



amount of, 92, (Fig. 55). 

 circumstances favouring, 95. 

 force of, 98. 

 rate of, 94, (Fig. 56). 

 reduction of, 95, 382, 386, 390, 



395- 

 suction action of, 99, (Fig. 61). 

 Traveller's Joy {see Clematis), 



164, (Fig. 109), 353. 

 Trees, 106-22, (Figs. 65-78), 



270-314, (Figs. 180-205). 

 Trefoil, Hop, 378. 

 Trientalis, 250, 353. 

 Trifolium > 246, 378. 

 Triglochin, 383. 

 Trimorphic flowers, 177, 205. 

 Tritoma, 267. 

 Tropophytes, 318. 

 Tubers, root-, 60, 62-4, (Fig. 28). 



stem-, 128-31, (Fig. 83). 

 Tubular flowers, 17192, (Figs. 



1 1 5-1 8, 120-30). 

 Tubuliflorae, 262. 

 Tulip, 134-7, (Figs. 85-6), 207, 



266. 

 Tulipa, 266. 

 Tunicated bulb, 135. 

 Tunics, 135. 



Turgidity, 52, 96-7, (Fig. 57). 

 Turnip, 59, (Fig. 26), 125, 238. 

 Tussilago, 379. 

 Tussocks, formation of, 367, (Fig 



236). 

 Tway-blade, 269, 349. 

 Twining stems, 142-4, 341. 

 clockwise, 144, (Fig. 90), 341. 

 contra-clockwise, 144, (Fig. 



89), 34i- 



Ulex, 246. 



Ulmus, 295. 



Umbelliferae, 246-8, (Fig. 168). 



Umbels, 173, 246. 



compound, 173. 



simple, 176, (Fig. 121). 

 Urtica, 379. 



Valerian, 222, ij6. 

 V actinium, 317, 391. 

 Vascular bundles, 68-71, (Figs. 

 3i-4o). 

 closed and open, 70. 



