INDEX 



225 



Mosses, reproduction, 63 



sporophyte, 71 



summary, 70 



Moth mullein, Fig. 114, p. 183 

 Motherwort, Fig. 94, p. 158 

 Mountain ash, Fig. 97, p. 162 



laurel, Fig. 109, p. 179 

 Mouse-ear, Fig. 108, p. 175 

 Mucor, 51 

 Mucronate apex of leaves, 159 



Fig. 95, p. 160 

 Mulberry, Fig. 128, p. 200 

 Mullein, Fig. 91, p. 154 

 Multilocular dehiscent fruits, 205 

 Multiple accessory fruits, 197 



dehiscent fruits, 205 

 Musci, 63 



Figs. 31-36, pp. 65-70 

 Mushrooms, 52 

 Mycelium, 46 



NASTURTIUM, Fig. 90, p. 153 



Neck, 63 



Nectar, 189 



Nepeta cataria, Fig. 93, p. 157 



Net-veined leaves, 121, 123 



New Jersey tea, roots, Fig. 72, p. 



127 



Nitrifying bacteria, 36 

 Nodes, 109 

 Nodulated surface of roots, 132 



Fig. 73, p. 128 

 Nostoc, 24, 31 



Figs. 2-3, pp. 24-25 



habitat, 24 



histology, 26 



morphology, 25 



reproduction, 26 

 Nucellus, 100, 101, 184 

 Nutlets, 193, 195 

 Nuts, 193, 195 



Fig. 123, p. 194 

 Nux vomica, 207 



'O 



OAK, black, Fig. 96, p. 161 



chestnut, Figs. 93, 94, pp. 157, 



158 



white, Fig. 92, p. 155 

 Oblanceolate outline of leaves, 162 



Fig. 96, p. 161 

 15 



Oblique base of leaves, 156 

 Fig. 92, p. 155 



rhizomes, 137 



roots, 130 

 Obovate outline of leaves, 162 



Fig. 96, p. 161 

 Obtuse apex of leaves, 159 



Fig. 95, p. 160 



Oblong outline of leaves, 159 

 Fig. 96, p. 161 



base of leaves, 156 



Fig. 92, p. 155 

 Odor, 189 



Odostemon sp., root, Fig. 73, p. 128 

 Onoclea sensibilis, Fig. 38, p. 74 

 Oogonia, 29 

 Oosperm, 103 

 Oospheres, 29 

 Open sheath, 156 



vascular bundle, 123 



venation, 121 

 Operculum, 65 

 Opposite branches, 133 



cotyledons, 122 



leaves, 167 



Fig. 99, p. 164 



Orchid, roots, Fig. 72, p. 127 

 Organisms, 17 

 Organs, 17 



Orris root, Fig. 75, p. 134 

 Osmunda cinnamomea, Figs. 38, 

 46, pp. 74, 84 



claytpnina, Fig. 38, p. 74 



regalis, Fig. 38, p. 74 

 Ostrya virginiana, Fig. 122, p. 193 

 Ovary, 111, 112, 184 

 Ovate outline of leaves, 161 



Fig. 96, p. 161 

 Ovule-bearing scales, 100 

 Ovules, 100, 111, 184, 185 

 Oxalis stricta, Fig. 95, p. 160 



PALATE, 180 



Palmate type of leaves, 158 



Fig. 97, p. 162 

 Panicle, 174 



Fig. 107, p. 174 

 Papaver somniferum, Fig. 132, p. 



205 



Parallel-veined leaves, 118, 164 

 Parasites, harmful, 38 



