INDEX 



269 



Clover, 41. 



alsike, 41-42. 



Bokhara, 53. 



bur. 32, 41. 



crimson, 41, 52. 



Japan, 32, 41-42. 



production of, 16. 

 by states, 84. 



red, 41^2. 



sweet, 41-42, 53. 



true, 41. 



white, 41-42. 

 Cob, corn, morphology of, 116. 

 Cock's-foot grass, 216, 227. 

 Code, American, 259. 



Vienna, 258. 

 Codes of botanical nomenclature, 258. 



comparison of American and Inter- 

 national, 260. 

 Coix, 159, 162. 



lacryma-Jobi, 162. 

 Collar of leaf, 105. 

 Colorado-grass, 50, 183. 

 Cord-grass, 39, 40. 

 Corms, 102, 141. 

 Corn-cob, morphology of, 116. 



history of, 161-162. 



origin of, 161. 



used for hay and forage, 48-49. 



varieties of, 161. 

 Cortaderia, 219, 220, 224. 



argentea, 224. 



jubata, 224. 

 Cottea, 219. 

 Couch-grass, 78, 238. 

 Cowpea, 51. 

 Crab-grass, 50, 148, 181. 



weed, 66, 76-77. 

 Creeping bent for lawns, 61-62. 

 Crested dog's-tail, 220. 

 Crop-grass, 181. 

 Crowfoot-grass, 76. 

 Culm, 99. 



Curly mesquite, 27, 173. 

 Cymbopogon, 166, 169. 



citratus, 170. 



Nardus, 114, 170. 

 Cynodon dactylon, 215. 

 Cynosurus cristatus, 220. 



Dactylis, 222, 226. 



glomerata, 226. 

 Dactyloctenium, 213. 

 Danthonia, 209. 

 Darnel, 237. 

 Deschampsia, 209. 

 Deserts, 144-145. 



Diarrhena, 221. 

 Dichanthelium, 182. 

 Digitaria humifusa, 181. 

 Dissanthelium, 221. 

 Distichlis, 219, 220, 225. 



spicata, 225. 

 Distribution, circumpolar, 149. 



generic, 149-150. 



geographical, 147-150. 



of grasses, 148. 



of species, 148-149. 

 Dunes, sand, 143-144. 

 Duration, 99. 

 Durra, 170, 172. 



Echinochloa, 176, 179, 183. 



colonum, 184. 



Crus-galli, 106, 183. 



frumentacea, 183-184. 



sabulicola, 146. 

 Ecology, 133-150. 

 Egyptian corn, 170. 

 Einkorn, 241, 242. 

 Eleusine, 214. 



indica, 148. 

 Elionurus, 165. 

 Elymus, 235, 236, 246. 



arenarius, 144. 



canadensis, 39. 



flavescens, 144. 



glaucus, 39. 



virginicua, 39. 

 Embryo, 131, 136. 

 Emmer, 239, 242. 



fruit of, 139. 

 Endosperm, 131. 



Environment, adaptation to, 139. 

 Epiblast, 136. 

 Epicampes, 198. 



rigens, 202. 

 Eragrostis, 219, 222, 225. 



abyssinica, 225. 



cilianensis, 225. 



megastachya, 225. 

 Erianthus, 165, 167. 



divaricatus, 168. 



Ravennse, 167. 

 Eriochloa, 176, 178. 

 Erodium cicutarium, 26. 

 Esparto, 73-74, 200. 

 Euchlsena, 159, 160. 



mexicana, 160. 

 Eulalia, 68, 



japonica, 166. 

 Eurotia lanata, 21. 



Evolution, doctrine of, applied to 

 classification, 151. 



