1 ^»1 9] HaU-Goodspecd : ( 'h rijsU ^ 91 



and Gutirrrrzia and in a recent Experiment Station bulletin it has 

 been adopted for 7'etradijinia glahrata.^ But on grounds of usage as 

 well as priority the term " Rabbit -brush ' " should be used only for 

 species of (linjsotltamnHH. It is defined in this sense in three of the 

 leading dictionaries used in America and also in some designed more 

 especially for use in Europe. "Rabbit-brush" is given as the com- 

 mon name for (Jlirysothamnus in at least fifteen floras and technical 

 reports and, so far as we can discover, it has never been defined either 

 in dictionaries or in floras as belonging to any otlier plant. While 

 there is considerable misapplication of the term by stockmen and other 

 residents of the AVest, yet it is much more frequently applied to these 

 plants than to any others. The name "Golden Bush" is used some- 

 what in the Rocky Mountain states. The undiscriminating sometimes 

 fail to distinguish between these plants and Sage-brush, but the true 

 Sage-brush {Artemisia tridentata) is a very ditt'erent plant and maybe 

 recognized by the leaves, which are, for the most part, three-toothed at 

 the summit, whereas in the Rabbit-brush they are always entire. 



The Paiute name for any sort of Chrysothamnus from which rubber 

 is prepared is tsigupi (pronounced tse-gdo-pee) ; or if the plant grows 

 in sandy soil it is called trha-tsigupi. It is possible that the older In- 

 dians restricted the use of tcha-fsigupi to some particular variety, but 

 the younger generation is not so discriminating. Dr. A. L. Kroeber, 

 who has indicated for us the proper spelling of these words, says that 

 teha means "sun." According to Dr. David P. Barrows, the Coahuilla 

 Indians of southern California call the graveolens form tes-i-nit and 

 prepare from its twigs a tea taken for coughs and pains in the chest. 



V. CHRYSOTHAMNUS NAUSEOSUS: HABIT, FLOWERING, 



RATE OB^ GROWTH, ETC. 



All of the species of (Jhi-ysotliamnus are shrubs. Some are mere 

 dwarfs but those which interest us as possible rubber ])rodueers are 

 usually of good size, measuring three to eight feet high, and about as 

 broad. The rubber is present for the most part in those stem parts 

 which are three years old or more, and these portions in average ma- 

 ture plants of the more important varieties {viriduhis, hololeiicus, etc.) 

 will weigh fi-om five to fifteen pounds (2.3 to 6.8 kg.). An exceptionally 

 large plant found near Lone Pine, California, weighed sixty pounds ex- 



« Nevada Exporinieiit Statiou, Bull. 95 (July, 1918j, pp. 2, 7. 



