554 



Index 



Cell division, 19; and chromosomes, 292- 



296; and osmosis, 87; and walls, 56. 

 Cells, 15; guard, 26. 

 Cells, tissues, and organs, 21. 

 Cellulose, 56. 

 Cell walls, 18. 

 Century plant, 172. 

 Cereus, 169, 171. 

 Chemical elements, 216. 

 Chicle, 374. 



Chlamydomonas, 445, 448, 455. 

 Chlorenchyma, 25. 

 Chlorophycecs, 445. 

 Chlorophyll, 29, 52, 69. 

 Chloroplasts, 29. 

 Chromosomes, 294; behavior of, 292-296; 



numbers of, 487. 

 Cion, 158. 

 Cladonia, 414. 



Classification, 437; of woods, 152. 

 Clavaria, 420. 

 Climate and crops, 340. 

 Climatic formations, 306. 

 Climbers, 107. 



Clover, red, 206; root nodules of, 397. 

 Club mosses, 489. 

 Club root, 432. 

 Cocklebur, 267. 

 Coconut, 371. 

 Coffee, 258. 

 Collenchyma, 130. 

 Colors of leaves, 52. 

 Companion cells, 134. 

 Compass plants, 66. 

 Compositce, 543- 

 Concord grape, 274. 



Conduction, of water, 160; of food, 163. 

 Conductive tissues, of leaves, 30; of roots, 



183; of stems, 133- 

 Conifer forest, northern, 312; southeastern, 



320; western, 330. 

 Conifers, 508 ; leaves of, 509 ; life history of, 



510; seeds of, 514; stem structures, 141. 

 Coppice, 230. 

 Cork, s6. 

 Corm, 113. 

 Com, 177, 233; acre of, 38, 50, 76, 941 stem 



of, 137- 

 Corolla, 238. 

 Cortex, 131. . 

 Corymb, 232. 

 Cotton, fiber of, 274; production of, 354; 



wilt disease of, 298. 

 Cotyledons, 257. 



Cowpeas, 401. 



Cranberry, 539. 



Craterellus, 413, 420. 



Crop centers, 343. 



Crops and water balance, 94, 211. 



Cruciferm, 534- 



Cup fungi, 413. 



Cutin, 26, 56, 76. 



Cuttings, 227. 



Cycads, 503. 



Cypress, 256; bald, 321. 



Cytoplasm, 17. 



Dahlia, 206. 



Damping off, 431. 



Dandelion, 178. 



Dasheen, 113. 



Date palm, 118; transpiration of, 75. 



Deciduous forest, 319; industries of, 347. 



Deciduous habit, 102. 



Deliquescent stems, 121. 



Desert, plants of, 79, 168; southwestern, 



337- 

 Diastase, 164. 

 Diatoms, 444. 



Dicots, stem structure of, 131. 

 Dicotyledons, 523; families of, 524. 

 Dictyota, 462. 

 Diffusion, 82. 

 Digestion, 163. 

 Diseases, bacterial, 391, 423; fungous, 423; 



resistance to, 276. 

 Distribution of plants, 302. 

 Dodder, 380. 

 Dogbane, 112. 

 Dogwood, 64, 519. 

 Dormancy, 264. 

 Douglas fir, 361, 369, 509. 

 Drainage, 49. 



Drought, effects of, 168; resistance to, 80. 

 Drupe, 253. 



Ecological factors, 10, 203. 



Egg, fertilization of, 249. 



Elements, mineral, 216. 



Elodea, 36. 



Embryo, 250, 257; of angiosperm, 257, 



521 ; of conifer, 513 ; of cycad, 507 ; of di- 



cot, 258; of monocot, 258; sac, 248, 249; 



of selaginella, 492. 

 Endosperm, 249, 250; of angiosperms, 522; 



of gymnosperms, 514. 

 Energy and life, 378. 

 Energy release, 48. 



