374 
Medicinal plants, 335, 336. 
Medullary ray, *68, *70, *71, *72, 
*73, 74. 
Megaspore, *301. 
Megasporophyll, 302. 
Melon, palmately netted-veined leaf 
of, *99, 
Melon-cactus, 61, *117. 
Mesophytes, 114, 118. 
Micropyle, 5. 
Microsphera, type study, 250-252*. 
Microspores, *301. 
Microsporophyll, 302. 
Midrib, 98. 
Mineral matter accumulated in the 
leaf, 135. 
Mnium, type study, 272-277%. 
Mold, black, type study, 246-249*, 
Monadelphous, *154. 
Monocotyledonous plants, 28, 211. 
Monocotyledonous stems, *65, 66, 
67: 
Monocotyledonous stems, growth 
of, in thickness, 67. 
Monocotyledons, 211. 
Moneecious, 149. 
Monotropa, 139. 
Morchella, *252, *253. 
Morel, *252, *253. ; 
Morning-glory, rate of increase of, 
201, 202. 
Morphology, 1, 27. 
Mosaic, leaf, 106, *107. 
Mosses, 272-279*. 
Moths, *174. 
Movement of water in plants, 39, 
_ 40, 46-48%, 78.81, *81. 
Movements of floral organs, *176,. 
HITT, 
Movements of leaves, 108-112*. 
ESSENTIALS OF BOTANY 
Movements toward light, 111, 112. 
Mucronate, App. I, *356. 
Mulberry, *189. 
Multiple fruits, #189, 190. 
Mushroom, type study, *260, *261. 
Mutilated seedlings, growth of, 12, 
#13, 
Mycelium, *247, #251. 
Myrsiphyllum, *62. 
Naked buds, *88. 
‘Nasturtium leaves, starch in, 139, 
#140. 
Nasturtium, study of, 1-3. 
Natural selection, 206. 
Nectar, 170. 
Nectar-glands, 170, *171. 
Nectar-gnides, 172. 
Nectaries, 170. 
Negundo, radial and cross-sections 
of stem of, *70. 
Netted-veined, #98, *99. 
Nettle, stinging hair of, *126. 
Nightshade, leaf of, *124. 
Nitrogen, 140. 
Nocturnal position, *109, *110. 
Node, 26, 65. 
Nucleus, #43, *222. 
Nucleus of root-hair, *46. 
Nut, *186. 
Nutrient substances, 187-140. 
Oak leaves, arrangement of, 105, 
*106. 
Oat, root-system of, 39. 
Obcordate, App. I, *356. 
Obovate, App. I, #355. 
Obtuse, App. I, *356. 
Odors of flowers, 170, 171. 
Offensive-smelling plants, 125. 
