400 



INDEX 



Devil's-claw, I, 141-145 

 Devil's shoestring, VII, 289 

 De Vries on work of Mendel, V, 

 351; experiments with prim- 

 rose, VII, 136-137; on Men- 

 del's work, VII, 351; accepts 

 Mendelian theory, VIII, 346 

 Dewberry, IV, 213; 231-232; 



251-258 

 Dianthus, I, 123-125; 133-135; 



VII, 173-177 

 Dictator raspberry, IV, 243 

 Digitalis, II, 350 

 Diseases of plants, VI, 234-238 ; 



VII, 317, 319-321 

 Disinfectants, III, 172 

 Dixie lippia, VII, 267 

 Dodecatheon, VII, 132-133 

 Dogwood tree, VIII, 171 

 Dominance, VII, 870, 374-376 

 Dominant tendencies, VII, 26 

 Doncaster, Dr. L., quoted, I, 60 

 Doris hybrid plum, IV, 138 

 Douglas spruce, VIII, 163 

 Dozen Other Delightful Ber- 

 ries, IV, 313-348 

 Drainage, III, 118, 121; VII, 



272-278 

 Drought, enemy of plants, I, 

 149; in New England, II, 20 

 Duarte plum. III, 338 

 Dwarf Rocky Mountain cherry, 

 III, 147-149 



East, Prof. E. M., on orange 



hybrids. III, 291 

 East plum, IV, 129 

 Easter Beurre pears. III, 163 

 Eel grass, II, 340 

 Egg plant, I, 247; V, 249 

 Egyptian cotton, cultivation of, 



VI, 52-58 

 Elaeagnus, improving the, IV, 



381-384 

 Elderberry, IV, 343-344 

 Elements of variation, II, 152- 



155 

 Elimination of seeds, IV, 93-94 

 Elm, VIII, 172-174 



Emerson, Ralph Waldo, I, 52; 

 III, 341; V, 53; VIII, 188 



Empress of India rose, VI, 238 



Empson pea, ripens all at once, 

 I, 272 



Engelmanni, VII, 249 



English Pond's seedling, 11,143 



Environment, external forces in 

 life, I, 38; variation caused 

 by, I, 39; adaptation of 

 plants to, 1,41; life challenge 

 to, 1, 53 ; improvement of race 

 dependent on, I, 67; adapta- 

 bility of Araucarias to, I, 87; 

 affects heredity in sweet pea, 

 first main influence, I, 

 105; combined with heredity, 

 I, 167; sweetness due to, I, 

 177; overbalanced by heredi- 

 ty, I, 185; relation between 

 heredity and, I, 199; serves 

 to bring out heredity, I, 

 201; stored-up heredity com- 

 bined with new, I, 231; hard- 

 ened heredity against new, I, 

 252; active influence of, I, 

 279; influence of, II, 96-97; 

 stored, II, 187; native plants 

 adapted to, IV, 234; impor- 

 tance of, VIII, 361-365; city, 

 VIII, 364; influence on moral 

 and mental development, 

 VIII, 365; modification by, 

 VIII, 375 



Environment and heredity, in- 

 teraction of, I, 42; must be 

 fitted to each other, I, 65 



Epau potato, V, 281-282 



Epoch plum, IV, 130 



Eschscholtzia, I, 243; III, 65 



Essential oils, VII, 41-44 



Ether, effect of, on plants, III, 

 323 



Eugenic breeding, VIII, 367- 

 358 



Euphorbia, I, 72 



Eureka raspberry, IV, 240-243 



Evening primrose, II, 22-31; 

 V, 145 



