462 



INDEX 



Climbing plants. 270, 271.* 272. 273,* 274, 



275.* 

 Clock, floral. 295. 



Clotbur, dispersal of seeds of, 324.* 

 Clover, benefited by lime, 151.* 



in crop rotation. 160. 



leaves of, follow sun, 218. 



position of flowers of, 307. 



root tubercle of. 149.* 



sleep position of, 218. 

 Clover, Bur, dispersal of seed of. 324.* 



Red. variation in, 448.* 449*- 450.* 

 Cobffia, calyx of, 288. 



Cobalt chloride, as index of transpira- 

 tion. 203. 

 Cockle - bur. resting period of seed of, 



44. 

 Cocoanut, distribution of, by water, 325. 



endosperm of. function of, 57, 179, 180. 



germination of, .56, 57,* 58. 



structure of fruit of. 56. 57,* 58. 

 Cocoanut oil. See Oil, cocoanut. 

 Cocos. See Cocoanut. 

 Cohn's solution, formula for, 398. 

 Cold. See Heat. 

 Collenchyma, 268.* 

 Colon bacillus. 371. 

 Color of autumn leaves, 332. 



— flowers, 297-300. 



— fruits, 316, 325 



— fruits and flowers affected by light, 



347. 



— night-blooming flowers, 300. 

 preferred by insects, 298, 299, 



Color-contrast in flowers, 297, 298. 

 Combustion, 35. 



as source of energy, 173. 



brought about by ferments, 173. 

 Companion cells. 227.* 231.* 232,* 255. 

 Comnass plants, 346. 



Composite family, cross - pollination of, 

 303.* 



— green flowers of. 349. 

 Composition of soil, 103-109. 



— starch, 186,* 187. 

 Compost, 147. 148. 

 Conditions of growth, 252, 253. 

 Conduction. See Stem, path of air, etc., in. 

 Conidia, 399, 402, 403, 



Conifers, humus of. preferred by som* 

 plants, 351. 



pollen of, carried by wind, 300. 



See, also. Pine. 

 Conn, on bacteria, 408. 

 Contagious diseases, 380. 

 Contact-bed for sewage, 382. 

 Contraction of root, 87. 



— wood, 68. 

 Convolvulus. See Bindweed. 

 Copper sulphate, 161. 



as a disinfectant, 364, 400, 401. 

 Coreopsis, cross-pollination of. 304. 

 Cork, 232,* 236,* 256. 279. 



protects against drying, 333. 

 Cork-cambium. 232,* 236.* 

 Corms, propagation by. 433. 



storage of food in. 260, 261. 

 Corn, bran of, 437. 



breeding of, 355, 434-441. 



canning of, 386. 



cross-pollination of. 302. 



endosperm of, 3,* 179. 



fat in. 437. 



fibrous bundles of, 225.* 226,* 230, 231.* 



food in. 3,* 437. 



germ of, 3,* 437. 



germination of, 21. 22.* 47. 71.* 72. 



getting above ground of, 71.* 



in silo, 388. 



leaf-scar of, 212. 



oil of, 437. 



original home of. 440. 



pepsin in, 172. 



pollen of, carried by wind, 301. 436. 



protection of, against drying, 213, 334, 



tip of stem, 71,* 79. 



proteid in, 437. 



roots of, explore soil thoroughly, 133 



strength of. 268. 



structure of. 268. 



root pressure of. 243. 



seed-leaf of. 3.* 179. 



self- vs. cross-pollination, 302. 



silk of, 292, 301. 



Smut of. See Smut of Corn. 



starch in, 3. 437. 



stem of. structure of, 225,* 230, 231 * 



rigidity of. 269. 



