r917] FAUST—RESIN SECRETION 443 
late July the flower stocks and heads are brown and dry. The 
leaves remain green until the first heavy frost, when they soon 
assume a crackling dryness. The plant is a xerophyte, and is com- 
monly found on the flats and upland plains, being especially abun- 
dant on the exposed south slopes of the hills. The writer has 
observed it frequently as high as 6000 ft. and occasionally in the 
subalpine areas of a still higher altitude. 
Specimens of primary rootstock of graduated diameters were 
dug and dry cleaned and then weighed. They were re-weighed 
until constant air dry values had been secured. Tables I and II 
show the results. 
TABLE I 
SHOWING WATER CONTENT OF PRIMARY ROOTS COLLECTED JULY 1915; COLLECTION 
DESIGNATED SERIES I 
Specimen | I | 2 | 3 | 4 | 5 6 
Diameter i min Se 2.5 5 0 hd 
Weight ty gan 3 0.221 | 1.429 | 1.250] 2.873 | 4.195 | 6.120 
Air WEN so 0.088 | 0.648 | 0.585 1.505 | 2.079] 3.002 
Percentage loss........... 60.69 | 54.65 | 51.45 | 47.60 | 50.44 | 50.95 
Average loss of series, 52.63 per cent. 
TABLE II 
SHOWING WATER CONTENT OF PRIMARY ROOTS COLLECTED OCTOBER 1915; COLLECTION 
DESIGNATED SERIES 
Specimen | r B 2 | 3 4 5 
laweter I WM) os seek cid. s 6.0 9.0 15.0 
Weight in QM has oo eos CEN 2.337 | 2-762 | 3-444] 4.144 | 6.425 
Pak Gly WEE Ss ro F107)" x L805 4 “2.038 | 3.477 
.60 6:30 | 50. 55.70 
Average loss of series, 53.60 per cent. 
Tables I and II show a more uniform correspondence for water 
content in October than in July, although the average water con- 
tent is practically the same in both series. In general one may 
conclude that the size of the root has no definite relation to its 
water content. Within the slight fluctuation the water content is 
directly proportional to the weight of the root. Also, the average 
water content is the same at these different seasons of the year. 
