J66 



Universihj of California Publications in Botaii}) [yo^i..! 



study will reduce it to a variety of nauseosus. The plants are two 

 to foui- feet liigii. i-ouud-topped, and very twigi^y. They grow on 

 saiid\- mounds of strongly alkaline clay fiats. The species has been 

 found only in Utah, and even there it is (piite I'ai-e. A single sample 

 (410) from the alkaline flats just east of Luntl analyzed 4.88 per cent 

 of rubbei". Since the species is so close to Haasrosiis botanically it is 

 probable that its rubber is also similar and should be referred to as 

 Chrysil. 



Fig. 1. Cliriisotlxuniins h'rclifolin.s growing aiiiony the locks at JJeiiton Hot 

 Springs, California. J'laiits average 1% feet high. 



Chrysothamnus teretifolius (Dur. and liilg.) Hall. 

 This is a low, broadly branched, woody plant, sometimes as much 

 as six feet high and fully as broad, but usually mueli smaller (cf. 

 fig. 1). Average plants will weigh one to three pounds. The lai-gest 

 we have seen had several trunks each eight inches thick and the whole 

 ]>lant had an estimated weight of twenty pounds. Unlike the genuine 

 species of Ckrysothainnas this one has a veiy resinous herbage and 

 because of this it is placed in tlu^ genus Ericameria by some botanists. 

 It grows on gravelly or ston\ iiillsides, often in rocky canon bottoms. 



