INDEX 
Marestail, air-passages of, *173. 
Mechanics of monocotyledonous 
stems, *84, 85. 
Medullary ray, 45, *101. 
Melon, palmately netted-veined 
leaf of, *133. 
Melon-cactus, 78, *80. 
Messmates, 340. 
Mesophytes, 317, 318. 
Mesquite, root-system of, 48. 
Metabolism, 165-176. 
Metabolism, digestive, 172. 
Micropyle, 6. 
Microsphera, study of, 263, 264. 
Microspores, *302. 
Microsporophyll, 302. 
Midrib, *133. 
Mildews, powdery, 263, *264. 
Mimicry, 347, 348. 
Mineral matter accumulated in the 
leaf, 165. 
Mistletoe, 337. 
Modified leaves, 121. 
Moisture-plants, 311-313. 
Monadelphous, 202, *204. 
Monocotyledonous plants, 34, 233. 
Monocotyledonous stems, *83, *84, 
*85, 86. 
Monocotyledonous stems, growth 
of, in thickness, 85, 86. 
Monocotyledonous stems, rise of 
water in, *110. 
Monocotyledons, 233. 
Moneecious, 200. 
Monotropa, 169. 
Morning-glory, rate of increase of, 
390, 391. 
Morphology, 1, 33. 
Moss, study of, 281-285. 
Mosses, 281—285*. 
Moths, *361, 362. 
405 
Mould, black, study of, 257, 258, 
259. 
Movement of water in plants, 107, 
*108, *109, *110, 111, 112, 113. 
Movements of floral organs, *365, 
*566. 
Movements of leaves, *144, *145, 
*146. 
Movements toward light, 148. 
Mucronate, *131. 
Mulberry, *226. 
Mullein, hairs from corolla of, 
*361. 
Multiple fruits, *226. 
Multiple primary roots, 14. 
Musci, 2382. 
Mushroom, study of, 264-266*. 
Mutilated seedlings, growth of, 14. 
Mycelium, 257, *258. 
Mykorhiza, 342. 
Myrsiphyllum, 79, *81. 
Myxogasteres, 252. 
Myxothallophytes, 232, 238. 
Naked buds, 121. 
Nasturtium leaves, starch in, *170. 
Natural selection, 394, 395. 
Nectar, 356. 
Nectar-glands, 356. 
Nectar-guides, 358. 
Nectaries, 357. 
Negundo, radial and cross-sections 
of stem of, *89. 
Nemalion, study of, 253, 254, *255. 
Netted-veined, *133. 
Nettle, stinging hair of, *184. 
Nightshade, leaf of, *349. 
Nitella, study of, 247-250. 
Nitrogen, 171, 340. 
Nocturnal position, *144, *145, 
Node, 31, 32, 83. 
