Index 



555 



Environment, lo; and distribution, 13,302; 

 and growth, 10; changes in, 306; fac- 

 tors of, 203; responses to, 203-224. 



Enzymes, 59, 164. 



Epidermis, of leaves, 24; of petals, 28, 241 ; 

 of roots, 183; of stems, 132. 



Epigynous, 239. 



Epiphytes, 187, 189. 



Equisetums, 488. 



EricacecB, 540. 



Eucalyptus, 517. 



Euphorbia, 169. 



Evening primrose, 204. 



Evergreens, 102. 



Evolution, 545. 



Excurrent stems, 121. 



Factors, limiting, 11, 14; of crop distribu- 

 tion, 340; of environment, 11, 203-224; 

 of evolution, 550. 



Fall of leaves, 100. 



Fat synthesis, 41. 



Fermentation, 410. 



Fern, cinnamon, 480; sensitive, 482; 

 shield, 481; staghorn, 483; tree, 479- 



Ferns, 478; growth of leaves, 98; life his- 

 tory of, 486. 



Fertilization, 243 ; in algae, 446 ; in conifers, 

 508; in cycads, 506; in ferns, 489; in 

 mosses, 474. 



Fertilizers, 220. 



Fibers, 56; Manila, 140. 



Fig, 252. 



Filicales, 478. 



Fire blight, 430. 



Flax, 136. 



Floating plants, 173. 



Floral, envelope, 240; plans, 238. 



Floriculture, 148. 



Flower, 232; clusters, 232; of dicot, 258; 

 economic importance of, 256; of monocot, 

 258. 



Flowering plants, 517. 



Flowers and insects, 243, 518. 



Fluctuations, 281. 



Fomes, 420. 



Food, 32; movement of, 163, 201; per acre, 

 46. 



Food accumulation, in fruits, 256; in roots, 

 202 ; in stems, 166. 



Food-conducting tissues, 31, 132, 134. 



Forest, deciduous, 318; fire patrol in, 

 367; lands, 362; northern evergreen, 

 312; reserves, 364; southeastern ever- 



green, 320; tropical evergreen, 322; 



western evergreen, 330. 

 Formations, climatic, 306. 

 Fossil, plants, 495; record, 497, 545. 

 Freezing, 213. 

 Fruits, 252; economic importance of, 256; 



ripening of, 255 ; transportation of, 260. 

 Fuciis, 458, 461. 

 Fungi, 402 ; distribution of, 406 ; groups 



of, 406; reproduction in, 405. 



Galls, 435- 



Gametes, 243. 



Garlic, wild, 226, 227. 



Geaster, 420. 



Gemmae, 468. 



Geographic distribution of vegetation, in 

 North America, 310; in United States, 

 312. 



Geological record, 545. 



Germination of seeds, 270. 



Glaciation map, 501. 



Glucose, 34. 



Gourd, 253. 



Grafting, 157, 228. 



Grain, 252. 



Grass family, 524. 



Gravity effects, 215. 



Green algae, 445. 



Green mold, 411. 



Green pigments, 52. 



Growing region, of leaves, 98; of roots, 183 ; 

 of stems, 128, 149. 



Growing season, 212. 



Growth, 97, 148 ; conditions for, 97 ; diam- 

 eter, 150; pressure, 200. 



Guard cells, 26. 



Guayule, 369. 



Guinea grass, 68. 



Gums, 57. 



Gymnosperms, 259, 503 ; leaves of, 509 ; 

 life history of, 503, 510; wood of, 152; 

 stems of, 141. 



Habitats, 13; and water balance, 93. 



Hairs, 78. 



Hardening, 214. 



Haustoria, 380. 



Head, 232, 236. 



Heartwood, 157. 



Heath family, 540. 



Hemp, Manila, 140. 



Herbs, 146. 



Heredity, 551. 



