332 



Index 



Clavaria, 267. 



Cleft grafting, 132. 



Climbers, 155. 



Closed bundle, 126. 



Clover leaf, 16, 44 ; root, 194. 



Club mosses, 286. 



Coconut, 214, 2r5, 306. 



Color of leaves, 43, 45. 



Commercial products, from leaves, 91 ; 



from roots, 194; from stems, 161. 

 Compass plants, 40. 

 Composite family, 315. 

 Concord grape, 225. 



Conduction, food, 105, 121 ; water, 121. 

 Conductive system, 121 ; significance of, 



290. 

 Conductive tissues, leaves, 20; roots, 169; 



stems, IDS, 121. 

 Conifer forests, 298. 

 Conifers, 118, 294; leaves of, 296; seeds 



of, 296; stem structure in, 128. 

 Copra, 214. 

 Cork, 163. 

 Corm, 160, 219. 

 Corn, 8, s°, 7.8, 79, 142, 164, 167, 179, 199, 



202, 205, 207, 209, 215, 221, 222. 

 Corolla, 200. 

 Cortex, iig, 120. 

 Cotton fiber, 215. 

 Cotyledon, 207. 

 Cowpeas, 194. 

 Craterellus, 267. 



Crop yields, 34, 230 ; and water supply, 51. 

 Cucumber, wild, 155. 

 Cuticle, 18, 54. 

 Cutin, 17. 

 Cuttings, 167. 

 Cypress, 296. 

 Cytoplasm, 15, 175. 



Dahlias, 97, 317. 



Dandelion, 103, 166, 229; leaf, 15; root, 



167. 

 Dasheen, 160, 163. 

 Date palm, no. 



Deciduous forest, 305, 312 ; habit, 63. 

 Deliquescent stems, in. 

 Desert plants, 58, 59, 134, IS7. 

 Development of plant kingdom, 300. 

 Diastase, 75. 

 Diatoms, 244. 



Dicots, 118, 209; stem structure, 120. 

 Dicotyledons, families of, 311. 

 Diffusion, 171. 

 Digestion, 74. 

 Diseases, bacterial, 253. 

 Dodder, 250. 



Dogwood, 39. 

 Dulse, 246. 



Duration, of leaves, 69; of stems, 94; o£ 

 roots, 185. 



Ecological factors, 140, 151 ; types of 

 leaves, 42, 43, 44, 56, 57 ; types of roots, 

 186; types of stems, 154. 



Ecology, 151. 



Economic importance, of algae, 245 ; _ of 

 bacteria, 251 ; of flowers, 214; of fruits, 

 214; of pond scums, 24s; of seeds, 

 214. 



Eel grass, S7. 91 • 



Egg cells, 205. 



Elements of soil, 141. 



Elodea, 28, 29, 57. 



Embryo, 206. 



Endosperm, 207. 



Energy, 82. 



Environment, 8, 139 ; changes in, 327 ; 

 complexity of, 130; factors of, 139; 

 responses to, 130, 131, 275. 



Enzymes, 74. 



Epidermis, 15, 17, 50, 276; importance of, 

 18; stem, 120; root, 169. 



Epiphytes, 188, 189. 



Equisetums, 285. 



Eucalyptus, 99. 



Euphorbia, 38. 



Evening primrose, 186. 



Evergreen habit, 69, 71. 



Evergreens, 64, 69. 



Evolution, 300, 318; and geographic dis- 

 tribution, 321 ; and intergrading species, 

 324 ; and life histories,' 324 ; and plant 

 breeding, 323 ; and plant structures, 

 323 ; factors of, 326. 



Excurrent stems, in. 



Fabrics from plants, 1. 



Factors, of evolution, 326; of the environ- 

 ment, 139. 



Fats, production of, 31. 



Fermentation, 261. 



Ferns, 39, 98, 298; leaves of, 15, 88, 185, 

 283 ; Ufe history of, 288 ; number of, 

 303 ; walking, 283. 



Fertihzation, 205 ; in conifers, 296 ; in 

 ferns, 289 ; in mosses, 280. 



Fiber, i, 91, 213, 228; Manila, 91. 



Filament, 200. 



Flax, 163. 



Floral envelope, 200. 



Floriculture, 100. 



Flower, 198, 200; clusters, 198; dicot, 

 209 ; monocot, 209. 



