INDEX 



(References to illustrations are indicated by asterisks accompanying page numbers 



Achiliea (yarrow), 181 



Adjustment to environment, 19 



Algse, 75 ; general study of, 82 



American elm, plan and develop- 

 ment, 13, 110* 



Anaphase, 37 



Anatomy, of Adiantum, 116 ; of 

 Pteris aquilina, 118 



Angiosperms (dicotyledons), 143 ; 

 sporophyte of, 143 ; reproduction 

 of, 146 ; hardwood trees, 161 



Anthers, 65 



Apple, cultivated, 180 



Araceae, 190 



Aspergillus, 96 



Aster, 9 



Bacteria, 89, 91* 



Bark, 41, 42 ; kinds of, 164* 



Body plan, 3 ; of lilac, 3 ; spiral, 4* 



Bryophyta, 103 



Buds, section of, 5* ; structure and 



growth of, 34 

 Buttercup, 171 



Capsella, ovule and embryo, 67* ; 



flower of, 149 

 Catnip, 9 

 Cell, and tissue differentiation, 23* ; 



and cell division, 35 

 Cell division (mitosis), 35 

 Cell structure and growth, 31 

 Cells, growth of, 33* 

 Cellular structure, 22 

 Cell-wall thickening, 24* 

 Chlamydomonas, 76 

 Chloroplastids in Elodea, 30 

 Chromoplastids, 31 

 Chromosomes, 35 

 Cinquefoil (Potentilla), 179 

 Collenchyma, 24* 

 Columbine (Afjuiliyiti). 173 



Compositae, 181 

 Coniferales, 135 

 Cross-pollination, 70 

 Cruciferae, 17 5 

 Cycadales (cycads), 130 

 Cyclic plan of milkweed, 6* 



Dandelion, 183 



Dicotyledons (angiosperms), 143 ; 



stems of, 50, 51* ; trees and shrubs, 



155 ; herbaceous, 167 



Ecological relations of plants, 63 



Elm, American, 13, 16* 



Elodea canadensis, 30 



Equisetales, 123 ; sporophyte of, 123 



Equisetum arvense, 125 ; life history 

 of, 126 



Experiments, on tropisms, 20 ; fer- 

 mentation, 88 ; on bacteria, 89 



False Solomon's seal, 188 



Family record, trees, 157 ; herbs, 170 



Fermentation experiments, 88 



Filicales, 113; sporophyte, 113; asex- 

 ual reproduction, 120 ; gameto- 

 phyte, 121 ; life history of, 122 



Flower, parts of, 64 ; of angiosperms, 

 146, 147* 



Frtii/ftrift (stra\vberry), 179 



Fucus vesiculosus, 83 



Fungi, 86 



Gramineae, 191 



Growth, of root tips, 31 ; of root-tip 



cells, 33* 

 Gymnosperms, 130 ; softwood trees, 



159 



Hawthorn, bud of, 5* 



H< l/init/iii.^ tmnuus, stem sections, 51* 

 Hepatica, 171 



197 



