INDEX 
Light, plant associations, 326. 
Liliacese, 277. 
Lilies, 277. 
Lime, 300. 
Liverworts, 165. 
Lucerne, 293. 
Lycopodium, 202. 
Lycopods, 201. 
Madders, 307. 
Maize, 268. 
Male cell, 235. 
Mandarin, 299. 
Mangrove swamp, 336. 
Maple sap, 58. 
Marchantia, 167. 
Meadows, 345. 
Megaspore, Angiosperm, 235; coni- 
fer, 214; Selaginella, 205. 
Mesophyll, 17. 
Mesophytes, 327, 345. 
Microbe, 130. 
Micropyle, 229. 
Microspore, conifers, 212; Sela- 
ginella, 205. 
Mildew, 144; downy, 142. 
Midrib, 7. 
Mold, black, 139. 
Monocotyledons, 50, 56, 230; 
classification, 262; embryo, 
237. 
Morel, 148. 
Mosaic, 13. 
Moss, 175; flower, 177; groups, 
181. 
Motile leaves, 30. 
Mucor, 139. 
Mushroom, 153. 
Muskmelon, 314. 
Mustard Family, 286. 
Mycelium, 140. 
Mycorhiza, 159. 
361 
Nectar, 36, 242. 
Needle-leaves, 211. 
Nepenthes, 38. 
Nightshades, 304. 
Nitrogen fixation, 134, 135. 
Node, 5, 41. 
Nostoc, 99. 
Nucellus, 229. 
Nucleus, 103. 
Nutmeg melon, 314. 
Nutrition, 3. 
Oats, 266. 
Qdogonium, 108. 
Olive, 313. 
Odgonium, Fucus, 124; mildew, 
145; GSdogonium, 110; Perono- 
spora, 143; red Alge, 126; 
Vaucheria, 112. 
Oéspore, 107. 
Orange, 299. 
Orchidacex, 278. 
Orchids, 278; pollination, 248. 
Organ, 3. 
Oscillatoria, 100. 
Osmosis, 79. 
Ovary, 227. 
Ovule, Angiosperm, 228; conifer, 
214. 
Palisade layer, 25. 
Palisade tissue, 17. 
Palms, 271. 
Pappus, 310. 
Parasite, 129. 
Pasture grass, 271. 
Pea, 293. 
Peach, 288. 
Peanut, 294. 
Pear, 291. 
Peat, 175; bogs, 336. 
Perianth, 222. 
