Index 
Microspores, 24, 25, 27, 28 
Midsummer-dream plant, 357 
Milkweed (of South Africa), 110 
Milkweed, trap of, 309, 310, 311, 
313, 314, 315 
Milkweed, seeds of, 349 
Milton quoted, 355 
Mineral crystals, 386 
Mistletoe, 98, 108 
Monocotyledon, 121, 128 
Monocotyledons, 117 
leaves of, 123 
Moneecious flowers, 69 
‘‘Moneeciously  polygamous’’ 
flowers, 73 
Moonworts, 266 
Morning-glory vines, 236, 239 
Mosses, 248, 385 7 
Moth, 34 
Moths: 
crepiscular, 200 
hawk, 202, 203 
humming-bird, 203 
nocturnal, 33, 200 
twilight, 33 
sphinx, 203, 221 
Mountain evergreens, 272 
Mucilage, 186, 187, 255, 386 
Mullein, 320, 347 
Miiller quoted, 42, 173, 211, 304 
Naked flowers, 66 
National flower of Scotland, 337 
Natural wind-break, 271, 272 
‘« Nature’s most valuable colon- 
ists,’’ 156 
Nectar, 29, 30 
Neck-canal cells, 255 
Needle-like leaves, 272, 274, 276, 
279 
Nettle, 332, 333 
flowers of, 330, 331 
sting of, 329, 330 
Nettles, 317 
Net-veined leaves, 148 
Night-blooming cereus, 27, 200 
flowers, 200, 227 
Nitrogen, 90, 300 
Nocturnal flowers, 225 
moths, 200 
Nodes of grasses, 158 
407 
November violets, 375, 378 
Nuts, 71, 84 
Oak, 56, 62, 64, 69, 85, 86, 120 
Oaks, 93 
Oat, I61 
Oat-blossoms, 162, 165, 166 
Oats, I5I 
Oat-spikelets, 16 
October dandelions, 377 
(nothera biennis, 213 
Ogle (Dr.), 80 
Oil, 119, 249, 386 
Oleander, 106 
Oosphere, 256, 
Oospore, 256, 257, 259 
Open fibro-vascular bundles, 134 
Ophioglossacez, 266 
Orange-tree. 326 
Orchid, 27, 48 
Orchids, 25, 34, II7 
Osmunda, 262, 265 
Ovary, 47 
Ovule of a cone-bearer, 290 
Ovule of the yew, 297 
Oxygen, 90, 100, IOr 
Painted-cup, 98 
Palez, 164, 165 
Palet, 164 
Palmetto trunk, 127, 130, 131 
Palmettos, 126, 140 
Palms, 117 
Panic-grass, 153 
Papyrus, 197 
Parallel veins, 123 
Parasites, 98, 99, 269 
Parasitism, 97, 98 
Pasture-thistles, 342 
Pear-tree, 55 
Peas, 119 
Peel of a potato, 388 
Peony, 28 
Perfect flower, 77 
Perigynium, 196 
Petals, 21 
Phanerogams, 248 
Phosphorus, go 
Phosphoric acid, 369 
Phragmites communis, 175 
