360 



INDEX 



Gooseberry, 298. 



Gourd fruit, 314. 



Grafting, 56, 317. 



Grafts, 317. 



Grain, 239. 



Gramineae, 263. 



Grape, 298. 



Grape-fruit, 299. 



Grasses, 263. 



Green Algae, 102. 



Green felt, 111. 



Green slime, 101. 



Growth, leaf, 23; root, 76; stem, 



59. 



Guard-cells, 16. 

 Gulf weed, 118. 

 Gymnosperms, 50, 207; general 



character, 210. 



Hair, 26. 



Hay grass, 271. 



Head, 234. 



Heaths, 302. 



Heliotropism, 93. 



Hemp, 297. 



Heredity, 316. 



Heterocyst, 100. 



Heterospory, 207; Selaginella, 204. 



Horsetails, 197. 



Host, 129. 



Houstonia, pollination, 250. 



Huckleberry, 303. 



Humus, 77. 



Hybrid, 253, 317. 



Hydrophytes, 326, 328. 



Hydrotropism, 90. 



Hypocotyl, 85; escape of, 89. 



Indusium, 191. 

 Insects and flowers, 242. 

 Integument, 229. 

 Internode, 41. 



Involucre, 310. 

 Iodine, source, 120. 

 Iridaceae, 278. 

 Irish moss, source, 126. 

 Iris, pollination, 247. 

 Irritability, 90. 



Jungermannia, 172. 



Keel, 247, 291. 

 Kelp, 117. 



Labiatae, 223, 307. 



Labiates, 307. 



Laminaria, 117. 



Lawn grass, 271. 



Layering, 47, 317. 



Leaf, arrangement, 5; autumnal 

 colors, 33; Bryophyte, 184; de- 

 ciduous, 32; evergreen, 33; fall, 

 32; fern, 187; foliage, 34; form, 7; 

 growth, 23; gutter-pointed, 356; 

 horizontal, 9; mosaic, 13; motile, 

 30; night position, 32; parts, 6; 

 profile, 29; protection, 24; rain, 

 32; relation to light, 8; rosette 

 habit, 11; shading, 10; special 

 forms, 34; structure, 15; vena- 

 tion, 6; water reservoir, 29. 



Leafy axis, erect, 181. 



Leafy liverworts, 172. 



Legume, 239. 



Legumes, 291. 



Leguminosae, 239, 291; pollination, 

 246. 



Lemon, 300. 



Liana, 48. 



Lichen, 160. 



Life-history, moss, 176; mushroom. 

 153; red Algae, 127; rusts, 149; 

 Selaginella, 205; Ulothrix, 107. 



Life-relations, 3. 



