INDEX 



347 



Thorny plants 210, 227, 294 



Thuja 7, 13, 20, 26, 28, 29, 55 



T. gigantea 192 



Tili, i. 21 



T. europeea (51, 234, 235 



T. grandifolia 236 



T. parvifolia 236 



Tips of leaves 105 



Tissues 67, 69, 78, 143 



Tobacco 110 



Tofieldia 148 



Tomato 71 



Tomentose surface 37, 222, 229, 



231, 249, 286, 288 

 Tomentum 145 

 Toothed margin 43, 231 

 Torch Pine 310 

 Torsions 8, 109 

 Transpiration 99, 104, 105, 113, 



122-125, 140, 142, 143 

 Transpiration-current 147 

 Transpiratory activity 138 

 Transverse section of leaf 86, 88 

 ' ' Trap to catch a sunbeam " 3, 12 

 Trapa 71 

 Traveller's Joy 58, 59, 63, 151, 



152 

 Tree of Heaven 164 

 Trembling of Aspen 121 

 Triangular leaf 26 

 Tri-foliolate leaf 38, 43, 44, 45, 



158 

 Trifolium 113 

 Tiistichous phyllotaxy 5 

 Tropceolum 21, 106, 111 

 T. Lobbianum 106 

 Tropical day 148 

 Tuber 67 

 Tubes 78 

 Tufted leaves 4 

 Turgescence 113, 114, 116 

 Turgid cell 87, 104, 116 

 Turgidity 93, 113, 114 

 Turkey Oak 211, 212 

 Turnip 71 



Twining shoots 151, 153, 304 

 Twisted petioles 148 

 Twistings of stem 8, 9, 11 

 Types of leaf-form 14 

 Types of venation 32 

 Typical cell 67, 73, 74, 77, 97 

 Typical foliage-leaves 6, 12, 14 



Ulex 161, 297, 299 



U. europceus 298 



U. nanus 299 



Ulmus 120 



U. campestris 240-243 



U. effusa 243 



U. glabra 241 



U. montana 241-243 



Ultra-violet rays 134 



Umbelliferae l9 



Umbrella and leaf compared 32, 



79, 80 

 Unbranched leaves 15 

 Underbush 304 

 Undivided leaf 15 

 Uni-foliolate leaf 44 

 Up and down movements 114, 115 

 Upper surface of leaf 36 

 Upright leaves 99 



Vaccinium Myrtillvs 59, 280, 284 



V. Oxycoccus 302 



V. uliginosum 26, 304 



V. Viiis-idcea 301 

 Vacuole 67, 75, 76, 93 

 Vapour-tension 91 

 Variation in position 112 

 Variation of leaves 44, 139, 140, 



209 

 Variations in growth 111 

 Variegated leaf 37 

 Varnished surface 36 

 Vascular bundles 32, 46, 48, 87, 



106, 122, 125 

 Vascular Cryptogams 77 

 Vascular network 83 

 Vascular pipe-ends 84 

 Vascular supply 140 

 Vascular system 79, 81, 82, 83, 84 

 Vascular tubes 32 

 Vegetable cell 74 

 Vein-endings 84 



Veins 14, 32, 33, 40, 16, 84, 100 

 Velvety surface 37, 241, 249, 254 

 Venation 14, 15, 28, 32, 33, 36, 



38, 39, 50, 81, 82, 83, 86, 94, 



122, 125, 143, 147, 151, 153 

 Vertical position of leaf lis 

 Verticil I ate leaves 7 

 Vessels 67, 72, 78, 79, 90, 94, 95, 



11:; 

 Viburnum 121 



