262 



INDEX. 



II 



Ilabenaria, 127. 



Hairs, 43, 92, 136, 14G, 202, 203. 



Halophytes, 109. 24!). 



Harebell, 19, SO. 



Hawthorn, 36. 



Heart-wood, 151. 



Beat, 112, 138, 145, 164. 



Heath plants, 189, 200, 214. 



Helianthemum, 236. 



Heliotropism, 12, 13, 68, 72, 73, 



139. 

 Hemlock, 190. 

 Horse-chestnut, 244. 

 Hosts, 106. 

 House leek, 19. 

 Houstonia, 129, 135. 

 Huckleberry, 214. 

 Hudsonia, 212. 

 Hura crepitans, 120. 

 Hydrogen, 153. 

 Hydrophytes, 168, 170, 174. 

 Hydrotropism, 91, 138. 



I 



Insects and flowers, 123. 

 Iris, 126, 133. 

 Isoetes, 94, 95, 208. 

 Ivy, 99. 



Juncus, 77. 

 Juniper, 51, 242. 



Lactuca, 12, 197, 198. 

 Lady-slipper, 132, 133, 134, 135 i 136 - 



Lakes, 143, 148. 



Laminaria, 177. 



Larch, 178, 190. 



Latex, 136. 



Leafless forests, 227. 



Leaflet, 19. 



Leaf- relation, 5:j. 



Lemna, 97. 



Lespedeza, 43. 



Lianas, 60, 61, 62, 63, 64, 102, 



246. 

 Lichens, 194, 209, 214. 

 Life- relations, 4, 7, 8, 53, 77. 

 Light, 143, 167, 197. 

 Light-relation, 7, 8. 

 Lily, 38, 40. 

 Live-for-ever, IS. 

 Live oak, 101. 

 Liverworts, 118. 

 Locomotion, 113. 

 Locust, 207. 

 Long moss, 96, 101. 

 Loosestrife, 130, 135. 

 Lotus, ISO. 



M 



Mangroves, 192, 192a. 

 Maple, 26, 115, 110. 

 Mara nt a, 38. 

 Marchantia, 107. 

 Meadows, 237, 238. 

 Mechanical tissue, 172. 

 Mesophyll, 38, 39, 40 41, 42, 152. 

 Mesopliytes. 168,233. 

 Migration, 58, 75, 147. 

 Mildew, 109, 157. 

 Milkweed, 117. 

 Mimosa. 199. 

 Mistletoe, 107. 

 Mold, 109. 



Monocotyledons, 35, 85, 88, 116, 

 186, 



