Harris: DESERT LORANTHACEAE 313 
in a perfect'y healthy and vigorous condition. The sap from the 
leaves of the host gave А = 2.25, P = 27.0. ; 
I was able to find only two trees of Fraxinus with Phora- 
dendron in the Basin, Santa Catalina Mountains. The results 
are: 
Coll. 518, Aug. 9. A = 1.97, P = 23.7 
For host, A = 1.58, P = 19.0 + 0:39, + 47 
Coll. 520, Aug. 9. A = 2.95, P= 25:8 
For host [A = 3.23, P = 38.7] --- 
For host, Aug. 19, А = 2.15, P = 25.9 
[+ о, — 0.1| 
The two collections of the parasite made on August 9 are very 
consistent. The determination for the host in the case of the 
second is obviously erroneous, presumably because of contamina- 
tion with salt. On August 19 another trip was made to the 
Basin for the specific purpose of obtaining another collection from 
this tree. The determination based on a sample of that date 
gives a distinctly lower value than the first determination from 
this tree, but a higher value than the one obtained August 9 from 
the first tree. Unfortunately there was not enough of the parasite 
for a second collection. 
Phoradendron macrophyllum Jonesii Trel. on 
Fraxinus attenuata Jones 
The following determinations were made from collections along 
Sabino Creek, at the mouth of Sabino Canyon, Santa Catalina 
Mountains. 
Coll. 542, August 14, First Mistletoe A = 1.99, P = 23.9 
For host, A = 2.17, P = 26.1 = O18, — 22 
Second Mistletoe A = 1.94, P = 23.4 
Same host determination + 023,..- .24 
My notes state in regard to the first of these parasites that the 
leaves are very yellow. Note that in both cases the determina- 
tion for the parasite is lower than is герое {һе сазе. 
Coll. 575, August 19, 1916. = 2.51, P = 30.1 
For host, A = 1.79, P = 21.5 ғар Wty 2-56 
August I9, 1916. А = 2.54, P = 30.5 
Same host tree, A = 1.76, P = 211 + 0.78, + 94 
