332 



Index 



Clavaria, 267. 



Cleft grafting, 132. 



Climbers, 155. 



Closed bundle, 126. 



Clover leaf, 16, 44; root, 194. 



Club mosses, 286. 



Coconut, 214, 215, 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, 105, 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, 50, 78, 79, 142, 164, 167, 179, 199, 



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



Corolla, 200. 



Cortex, 119, 1 20. 



Cotton fiber, 215. 



Cotyledon, 207. 



Cowpeas, 194. 



Craterellus, 267. 



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



Cucumber, wild, 155. 



Cuticle, 1 8, 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, 154, 157. 

 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 ; of 

 roots, 185. 



Ecological factors, 140, 151; types of 

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

 1 86 ; types of stems, 154. 



Ecology, 151. 



Economic importance, of algae, 245 ; of 

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

 214; of pond scums, 245; of seeds, 

 214. 



Eel grass, 57, 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, 150; factors of, 139; 

 responses to, 130, 131, 275. 



Enzymes, 74. 



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

 18; stem, 120; root, 169. 



Epiphytes, 1 88, 189. 



Equisetums, 285. 



Eucalyptus, 99. 



Euphorbia, 58. 



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, 325 ; and plant structures, 

 323 ; factors of, 326. 



Excurrent stems, in. 



Fabrics from plants, i. 



Factors, of evolution, 326; of the environ- 

 ment, 139. 



Fats, production of, 31. 



Fermentation, 261. 



Ferns, 59, 98, 298; leaves of, 15, 88, 185, 

 283; life history of, 288; number of, 

 303 ; walking, 283. 



Fertilization, 205; in conifers, 296; in 

 ferns, 289; in mosses, 280. 



Fiber, i, 91, 215, 228; Manila, 91. 



Filament, 200. 



Flax, 163. 



Floral envelope, 200. 



Floriculture, 100. 



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

 209; monocot, 209. 



