462 



IJVDA'X 



C'limbmg plants, 270, 271,* 272, 27:j,* 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, Bnr, dispersal of seed of, H24.* 



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

 CobjBa, calyx of, 288. 

 Cobalt chloride, as index of transiiirn- 



tion. 203. 

 Cockle - bur, resting period of seed of', 



44. 

 Cocoanut, distribution of, by water, ^"i."). 



endosperm of, function of, £7, 179, 180. 



germination of, 56, 57,* 58. 



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

 Cocoanut oil. See Oil. cocoanut. 

 Cocos. See Cocoanut. 

 Colin's solution, formula for, :i98. 

 Cold. See Heat. 

 Collenchyma, 2ilH * 

 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,* 2.%>. 

 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. 

 Couidia, 399, 402, 403. 



Conifers, humus of, preferred by some 

 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. Spp 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, liran of, 437. 



breeding of, 355, 434-441. 



canning of, 386. 



cross-pollination of. 302. 



endosperm of, 3,* 179, 



fat in. 437. 



fibrous bundles of, 22."),* 226,* XiO, 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. 331. 



— — tip of stem, 71,* 79. 

 proteid in, 437. 



roots of, explore soil thoroughly, 133. 

 strength of, 268. 



— — stnicture of, 268. 

 root pressure of, 243. 

 seed-leaf of, 3,* 179. 



self- vs. cross-pollination, 302. 



silk of, 202, 301. 



Smut of. See Smut of Corn. 



starch in, 3, 437. 



^tem of, structure of, 225,* 230, 331.* 



rigidity of, 269. 



