200 



PLANT GROWTH 



Insects, 97-103 

 control of, 97-103, 162 

 general groups, 101 



Internode, S3 



Ions, 50 



Iris 



bearded, 189 

 flower, 116 

 fruit and seed, 9 



Iron, 164, 169, 173 



Iron sulphate, 111 



Irregular flower, 116 



Irrigation, 48 



Japanese beetle, 162 



K 



Keel, 117 



Larkspur, 112, 114 

 Lawn grass, 95, 96, 108, 109 

 Layering, 71 

 Leaf, 72-78 



chlorophyll, 76 



chloroplast, 73, 76 



classes, 72 



compound, 72, PI. I, II 



mesophyll, 76 



modifications, 11, 78, 112 



position, 57 



simple, 72 



starch, 76 



structure, 72-78, 73 



sugar, 1(> 



venation, 72 

 Legumes, 159, 178 



Length of day, 84, 85, 112, 186, PI. V 

 Ligulate flowers, 118 

 Lime, 159-166, 171, 172, 176 

 Linkage, 27 , 135-137 

 Lodicules, 118 

 Long-day plants, 84 



Meiosis, 131-134 



Mendel, 123-139, 141 



Mendel's garden, PI. VII 



Mendelian characteristics, 137 



Mendelian inheritance, 123-139, 141, 143 



Mesophyll, Id 



Metaxenia, 120 



Micropyle, 8,\\1 



Minerals, 41-47, 50, 55, 166, 172, 185 



Mitosis, 131 



Modified leaves, 11, 112, 116 



Modified stems, 106 



Molecules, 41, 87 



Moisture, soil, 90 



Monocotyledon, 10, 53 



Moonvine plants, 184, PI. XVI 



Morning-glory, 184, PI. XVI 



Mulch, 159, 160, 184 



Mulching, 184 



Mutation, 143-145, 148 



Mycorrhiza, 39 



N 

 Nectar glands, 116 

 Nitrogen, 52, 80-82, 93-96 



high, 64, 65 



in soUs, 161, 164-170, 173, 175-180, PI. 

 XIII 

 Nitrogen cycle, 176-178, 178 

 Nitrogen-fixing bacteria, 161, 177-180 

 Node, 53, 59, PI. I 

 Nodules, 177, 178 

 Nucleus, 23-25 

 Nutrient solutions, 152 







Orchids, 171 



Organic matter in soils, 47, 51, 52 

 Osmosis, 42 

 Osmotic pressure, 36 

 Ovary, 113-115, 117, 119 

 Ovules, 117, 119 



Oxygen, 50, 51, 68, 75, Id, 79, 82, 83, 164, 

 179, 186 



M 



Magnesium, 164, 166, 169, 171 

 Manganese, 164, 165, 169 

 Manure, 51, 161, 170, 177, 179 



Palisade cells, 72, 73 



Panicles, 114 



Parental combination, 128, 136 



