360 
Gooseberry, 298. 
Gourd fruit, 314. 
Grafting, 56, 317. 
Grafts, 317. 
Grain, 239. 
Graminez, 263. 
Grape, 298. 
Grape-fruit, 299. 
Grasses, 263. 
Green Algze, 102. 
Green felt, 111. 
Green slime, 101. 
Growth, leaf, 23; root, 76; stem, 
59. 
Guard-cells, 16. 
Gulfweed, 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. 
INDEX 
Involucre, 310. 
Jodine, source, 120. 
Iridacee, 278. 
Trish moss, source, 126. 
Tris, pollination, 247. 
Irritability, 90. 
Jungermannia, 172. 
Keel, 247, 291. 
Kelp, 117. 
Labiate, 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. 
Leguminose, 239, 291; pollination, 
246. 
Lemon, 300. 
Liana, 48. 
Lichen, 160. 
Life-history, moss, 176; mushroom. 
153; red Alge, 127; rusts, 149; 
Selaginella, 205; Ulothrix, 107. 
Life-relations, 3. 
