1^11^1] Ilall-Goodsperd: Cliri/.sil 259 



(12) 111 harvesting wild shrub the whole plaiit should be taken, 

 including four inches of root. Bulk may be reduced by removing 

 the twigs. Cultivated plants might be so cut as to leave the base of 

 the stem for regeneration, 



(13) Because of the desirability of establishing the rubber-growing 

 industry- in the United States on waste lands Chrysothamnus and other 

 plants should be further investigated with a view to making their 

 cultivation a financial success. 



(14) Its cultural requirements are such that Chrysothamnus could 

 be grown on many of the alkaline plains of the West without irriga- 

 tion; certain varieties endure winter temperature of — 20° F. ; others 

 would withstand summer temperatures obtaining anywhere in the 

 western states except possibly in the hottest valleys. 



