Index 



469 



Color 17, 37; in seaweeds, 38, 446; in 

 foliage plants, 38; in spring vegeta- 

 tion, 39; screens, 39; in autumn leaves, 

 40; Plates II, III; in cross pollination, 

 308, 310, 319, 320; contrasts, 318; 

 variegation, 321; changes, 321; of 

 fruits, 398; in Fungi, 452 



Compass Plant, 232, 264 



Correlation in growth, 372 



Combustion, 89, 114 



Composite conceptions, 7, 9 



Compounding of leaves, 59 



Compromises in structure, 223 



Conduction, 145; system, 168 



Cone shapes of trees, 56, 58, 260 



Consciousness, 255 



Continuity of protoplasm, 157, 158 



Conventional constants, explained, 9; 

 26, 28, 31 



Copper beeches, 38, 436 



Corallines, 447 



Cork, 155 



Corn, silk, 307 



Cortex, 222 



Cotton seed, 389 



Cotyledons, 354 



Cross fertilization, 294; advantage of, 

 295; in water plants, 303 



Crossing, 437 



Cross pollination, 303; vs. cross fertili- 

 zation, 303; by water, 304; by wind, 

 305; by insects, 309; books on, 314; 

 arrangements to ensure, 315; by birds, 

 323; by snails, 324, 438 



Crystals, 134, 274 



Cultivation, 429, 442 



Cup leaves, 375 



Curbstones lifted, 78 



Cutin, 113, 157 



Cut-leaf forms, 436 



Cycles, in life, 163; in growth, 352 



Cytase, 128 



Cytology, denned, 2 



Cytoplasm, 150, 159 



Dandelion seed, 389 



Darkness, and plants, 91, 334 



Darwin; letter, 6; 11, 12, 234, 266, 294, 



314, 346, 347, 349, 406, 409; biography, 

 411, 417, 419, 423 



Date seed, 112, 156 



Death; 144, 163; cause in trees, 367 



Decay, described, 102 



Deciduous trees, shape, 51, 261, 262 



Denatured alcohol, 99 



Desert plants, characters, 203, 264, 465 



Development, 327, 340, 353 



De Vries, 418, 420, 423 



Dextrose, 27; chemistry, 107 



Diagrams, nature, 9 



Diastase, 110, 128 



Diatoms, 380, 420, 446 



Dichogamy, 315 



Dicotyledons, 460 



Diffusion, nature of, 175; diagram of, 

 176; of gases, 193, 206, 218 



Digestion, 110, 218 



Dimorphism, 316, 317 



Diseases, 102 



Dissemination, 116, 118, 279, 378; rea- 

 sons for, 378; methods, 379; locomo- 

 tion, 379; vs. cross pollination, 379; 

 by growth, 381; by shortening roots, 

 382; by projection, 383; by hygro- 

 scopic movements, 385; by gravita- 

 tion, 387; by winds, 387; by reduction 

 in size, 390; by water, 393; by animals, 

 394; by man, 399; minor adaptations, 

 401; books on, 401 



Distillation, 99 



Diversity of plants, 16 



Division, 145, 280 



Dixon and Joly, 216 



Dodder, 453 



Dominance, 296 



Double fertilization, 300, 356 



Double flowers, 375, 436 



Double fruits, 273 



Drainage, 87, 201 



Drains, filled by roots, 241 



"Drawing" of plants, 334, 431 



Dreams, 357 



Drowning of roots, 87 



Dry-blasting of plants, 202 



Dryness, protective, 266; protection 

 against, 267 



