INDEX 



The principal references are printed in heavier type. Illustrations 

 are indicated by (fig.} after the paginal reference. 



Abies, 335, 336 (fig.), 344, 347; 

 A. pectinata, 129. 



Abietineae, 335, 337, 340, 347. 



Abnormal growth, 142, 143 (fig.), 

 252, 254 (fig.), 267. 



Abscission-layer, 141, 142 (fig.). 



Absence-hypothesis, in hybridisa- 

 tion, 384. 



Absorption of carbon dioxide, 88, 



109, 259, 343. 



of food by, cotyledons, 150; em- 

 bryos, 282, 284, 302, 320, 351, 

 370; Fungi, 230, 232, 336, 252 ; 

 insectivorous plants, 150 ; 

 parasitic Angiosperms, 1 79 ; 

 plant-cells, 13, 15. 

 of mineral salts, 10, 13, 15, 72, 



270. 



of organic material, 72, 252. 

 of water, 147, 158 ; by aerial 

 roots, 73, 74 ; by aquatics, 93, 

 171 ; by Fern-prothalli, 301 ; 

 by Lichens, 259 ; by Liver- 

 worts, 270 ; by Mosses, 274, 

 276 ; by mucilage, 38 ; by 

 plant-cells, 10, 26 ; by root- 

 hairs, 67, 72. 



Absorptive hairs, 150. 



Acacia catechu, 39; A. Senegal, 39. 



Acacia, False (Robiniapseudacacia], 

 115, 126. 



Acacia, seedlings of, 395 (fig.), 396. 



Accumulation of food-substances, 

 13, 40. 



Acer, 130 ; A. pseudoplatanus, 10, 

 95, 121, 128 (fig.), 142 (fig.) ; 

 A. saccharinum, 45, 124; A. 

 striatum, 135. 



Acetic acid, 265 ; alcohol, 404. 



Achene, 371 (fig.). 



Achlya, 231. 



Acids, organic, 49, 53, 54, 60, 265, 

 302. 



Aconitine, 61. 



Aconitum napellus, 61. 



Acorn (Quercus), 60. 



Acorus calamus, stem-structure, 

 85 (ng.), 86. 



Acquired characters, inheritance of, 

 380. 



Activators, 57. 



Active hydathodes, 147. 



Active principle of, Aniseed (Pim- 

 pinella anisum], 62 ; Bitter 

 Almond (Prunus amygdalus), 

 48 ; Cinchona, 61 ; Cinnamon 

 (Cinnamomum zeylanicum] , 62 ; 

 Cloves (Eugenia caryop hyllata] , 

 62 ; Cruciferae, 48 ; Deadly 

 Nightshade (A tropa belladonna] , 

 6 1 ; Ergot (Claviceps pur- 

 pured), 255 ; Ervthroxylon coca, 

 6 1 ; Eucalyptus, 62 ; Foxglove 

 (Digitalis), 48 ; Ginger (Zin- 

 giber officinale], 63 ; Hemlock 

 (Conium maculatum], 61 ; Hen- 

 bane (Hyoscyamus niger], 61 ; 

 Hop (Humulus lupulus), 63 ; 

 Indigo-plant (Indigofera), 48 ; 

 Ipecacuanha (Psychotria ipeca- 

 cuanha], 6 1 ; Lavender (Laven- 

 dula], 62 ; Monkshood (Aconi- 

 tum napellus], 61 ; Opium 

 (Papaver somniferum], 61, 155 ; 

 Pepper (Piper], 63 ; Pepper- 

 mint (Mentha piperita], 62 ; 

 Quillaia-'bark, 48 ; Soapwort 

 (Saponaria], 48 ; Solanaceae, 

 61 ; Strychnos nux vomica, 61 ; 

 Thornapple (Datura stramo- 

 nium], 6 1 ; Tobacco (Nicotiana 

 tabacum], 61 ; Vanilla, 48 ; 

 Woad (I satis tinctoria], 48. 



Adaptation, 379 (fig.), 380 ; to 

 habitat, 158-79 (figs.), 210, 

 236, 238, 321 ; to insect- 

 pollination, 373. 



Adiantum, 291 (fig.), 296. 



