470) 
Death, 538, 56 
Decay, bacterial, 306-307 ; 
150, 157* 
Deciduous forests, 440-445 
Deciduous leaves, in conifers, 420; 
and transpiration, 66-67 
Deciduous trees, 99-100 
Dehiscent fruits, 277 
Deliquescent branching, 107 
Dendrobium anosmum (tr opical orchid), 
4*, 108* 
Desert regions, 57 
Deserts, 66*, 453-45 
Desmid, 337*, 338* 
Desmodium gangeticum (tick trefoil), 
pod of, 277* 
Dew, 70; and absorbing hairs, 82-83 
Diaphototropism, 110- 112 
Diastase, 295 
Diatoms, 338*, 342, 458 
Dichotomous branching, 872-373 
Dicotyledonous stem, anatomy of, 115— 
129; collenchyma of, 119-120; cor- 
tex of, 116-120; diagrams of, 138%, 
139* ; epidermis of, 116; general 
regions of, 115; parenchyma of, 
117-119; principal tissues in, 129; 
sclerenchyma of, 120 
fp ees ledoris: 28, 115, 279, 280, 428 ; 
stele of, 120- 127 
Dictyophallus (stinkhorn fungus), 361* 
Diffusion, 39-42, 101; of mineral mat- 
ter, 184-185 ; and transpiration, 58- 
59; through trichomes, 75; of water 
vapor in transpiration, 55 
Digestion of food, 293-295 
Dicecious plants, 206-207 
Dionaea muscipula (Venus’s-flytrap), 
84, 85*, 87 
Dioin edule, megasporophyll of, 408* 
Diospyros kaki (Japanese persimmon), 
cells of seed of, 292* 
Dipterocarpus grandiflorus, 
283* 
Disaccharide, 289 
Dispersion, of molecules in a solution, 
18, 19; of visible particles (colloidal 
dispersion), 18 
Dissemination, 6, 90, 95. See Seed, 
dispersal of 
Distribution and transpiration, 65 
Divergence of alternate leaves, 103-106 
Divisions of plants, 211, 304 
Dominance, 236-258 
Dormancy, 161, 162-163; of seed, 295— 
298 
in trees, 
7; plants of, 64, 66 
fruit of, 
A TEXTBOOK OF GENERAL BOTANY 
Dormant buds, 99 
Dormant trees, 161 
Drosera (sundew), 83-84 
Drupes, 277, 278 
Dry fruits, 277 
Dry regions, chlorenchyma in, 61-62 
Dry seasons and transpiration, 56-57 
Drynaria, branches of, 439* 
Ducts, resin, 127-128 
Earthstars, 365 
Ectocarpus, 339-340 
Eel grass (Vallisneria), 219; pollina- 
tion of, 216* 
Egg, 5, 206, 222, 413* ; of angiosperms, 
405 ; in archegonium, 369 
- Egg cell, of angiosperms, 431; of Cyca- 
dales, 409 
Eggplant, flower of, 3*, 5*; 
27* 
Eichhornia crassipes (water hyacinth), 
82% 
Elaeagnus philippensis, scale of, 75* 
Elements, on earth, 9; from soil, 11 
Elephantopus, achene of, 277* 
Elephant’s-ear (Alocasia indica), flow- 
ers of, 219* 
Elm, branch of, 99* 
Elodea, 430* 
Elongation in root, 178-180 
Embryo, 223, 279, 416* ; of Cycadales, 
410-411; development of, 6; of pine, 
425, 427 ; of Spermatophyta, 406-407. 
See Nucellus 
Embryo sac, 222; of angiosperms, 
406-407 ; of orchids, 431* 
Embryology, 262-263 
Emulsion, 19 
Emulsoid, 19 
Endocarp, 278 
Endodermis, in dicotyledonous stem, 
116-117 ; in-root, 198-194" | 
Endosperm in germination, 223, 280, 
292*, 302-303 
Endospores, 308 
Energy, conservation of, 48; green: 
plants and bacteria as sources of, 
308-309 ; of light in photosynthesis, 
43, 48-49; potential, 48 ; in respira- 
tion, 49 
Enlargement, phase of, 159 
Entada scandens, seeds of, 286* 
Enterolobium saman (rain tree), 107* ; 
flower cluster of, 217*; leaves of, 
46%*, 72%, 93% | 
Environment, 7 
leaf of, 
