Index 



Chrysil, a New Rubber from Chryso- 

 thamnus nauseosus, 183-:264; deti- 

 iiitioii of, LSS; first experiments 

 with, 1S8-1.S9; estimated possible 

 product of in western North 

 America, 197-210; determination 

 of presence of, microscopicallv, 

 210-215, chemically, 216-225, 

 with percentages, 226-2315; dis- 

 tribution in jilant, 2.'54-24;{; con- 

 tent of in different varieties, 

 243-244; effect of environment 

 on, 245 ; seasonal variation affect- 

 ing, 246-248; harvesting of, 248- 

 251; possibilities of product of, 

 in Chrysothannnis, 251, compared 

 with Guayule, 252-255. 



Chrysocoma graveolens, 174. 

 laetevirens, 174. 

 nauseosa, 165. 

 virens, 174. 



Chrysothamnus, as possible source 

 of rubber, 159, 184, 251-255, see 

 Chrysil; key to sections of, 160; 

 vegetative reproduction of, 250; 

 culture requirements, 255-257. 

 angustus, 177. 

 arizonicus, 167. 



californicus occidentalis, 168, 169. 

 confinis, 176. 

 consimilis, 176. 

 falcatus, 176. 

 formosus, 180. 

 frigidus concolor, 170. 

 Greenei, 243, 277. 

 Howardi, 243, 277. 

 humilis, 243, 277. 

 junceus, 180, 181. 

 linifolius, 243, 268. 

 Macounii, 180. 

 mohavensis, 179. 

 nioquinaus, 180. 



nauseosus, distinguishing character 

 of, 161; key to varieties of: 

 gray forms, 163-164, green 

 forms, 164-165; synopsis of 

 varieties of, 16.5-181; index to 

 specific and varietal names of, 

 181; habits and habitats, 191- 

 197; as source of rubber, see 

 Chrysil. 

 bemardinus, 171. 

 Bigelovii, 172. 

 caUfomicus, 174. 

 ceruminosus, 175. 

 consimilis, 176-177, 178, 192, 



194, 200, 203 (fig.), 227. 

 frigidus, 170, 196, 209, 229. 

 glareosus, 173. 



gnaphalodes, 166, 167-168, 192, 

 193, 196, 198, 199 (fig.), 229, 

 fig. opp. 260. 



graveolens, 174, 190, 191, 230. 



griseus, 202. 



hololeucus, 166, 191, 192, 193. 



junceus, 180. 



latisquameus, 167. 



leiospermus, 172, 173, 231, 244. 



mohavensis, 179, 195, 198, 200, 

 231. 



occidentaUs, 168, 231. 



oreophilus, 175. 



pinifoUus, 176, 192, 208, 209, 218, 

 231. 



plattensis, 170. 



salicifolius, 167. 



speciosus, 169, 196, 202, 232, fig. 

 ojip. 262. 



viridulus, 177, 188, 190, 191, 233, 

 fig. opp. 260, 262, 264. 

 nevadensis, 243, 277. 

 oreophilus, 175. 

 orthophyllus, 166. 

 pallidus, 170. 

 paniculatus, 243, 267. 

 Parryi, 243, 277. 

 patens, 176. 

 pinifolius, 176. 

 puberulus, 243, 277. 

 pulcherrimus, 169. 

 salicifolius, 167. 

 speciosus, 169. 



albicaulis, 165. 



gnaphalodes, 167. 



plattensis, 170. 

 teretifolius, 198, 201, 242, 243, 266- 



267. 

 tortuosus, 169. 



turbinatus, 180, 207, 243, 265-266. 

 viscidiflorus, 243, 277. 



Chrysothamnus nauseosus and its 

 Varieties, 159-181. 



Citrus (oranges and lemons), hosts 

 for Schizophyllum, 465. 



Cladoderris, compared to Schizo- 

 phyllum and Stereum, 463. 

 infundibuliformis, 463. 



Cladophora Mertensii, 280. 

 viminea, 280. 



Clavaria vermicularis, 457, 458. 



Cneoridium dumosum, 278. 



Codium fragile, host for Entocladia 

 codicola, 293, 294, and for species 

 of Ectocarpus, 407, 408, 409, 413, 

 415. 

 Setchellii, host for species of Ecto- 

 carpus, 407, 415. 



Codiolum polyrhizum, 298, 299. 



Coffea (coffee), host for Schizophyl- 

 lum, 465. 



Colorado rubber plant. See Hymen- 

 oxys tloribunda utilis. 



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