312 SEMI-CENTENNIAL OF TORREY BOTANICAL CLUB 
1914 suggested the desirability of the later studies in Jamaica 
and Arizona. 
The spring determinations were made+from trees іп the sandy 
(generally dry) bed of Agua Verde Creek, Tanque Verde Moun- 
tains. 
Coll. 94, Mar. 24, 1914. A = 2.56, P = 30.7 
For host, A = 1.39, P = 16.7 +1.17,, + 140 
The leaves of the host had not yet attained their full size. 
The leaves of the parasite, which was in flower, were of course old. 
A second visit to this locality was made later to determine whether 
the striking difference in the sap of the two sets of leaves might 
be due merely to differences in maturity. On April 8 the still 
not fully matured leaves of the host gave A — 1.44, ТЕ, 17.3; 
agreeing well with the values obtained on our first visit. 
Coll. 171, April 9, 1914. A -2.28;, P= 2714 
For host, A = 1.63, P = 19.6 +0.65, + 7.8 
These values, from a second large tree in the same locality, 
are in excellent agreement with those cited above. 
The following determinations were made on samples collected 
along Sabino Creek, at the mouth of Sabino Canyon, Santa Cata- 
lina Mountains. 
Coll. 268, July 7, 1916. Anz 3.29, Р.-<:39-5 
For host, A — 2.08, P — 24.9 + 1.21, + 14.6 
Coll. 270, July 7, 1916. A = 2.46, P = 29.5 
For host, А = 1.90, P = 22.8 +0.56, + 6.7 
The first of these samples was taken from a single large mistle- 
toe, the second from a number of small plants on another tree. 
Coll. 576, August 19, 1916. 
Sample B, ди 1.06, Р = 23.6 
— 29, “ted 
Sample C, 4234 P= 280 
+ 0.08, + I.0 
Sample D, A = 2.53, P = 304 
+ 0.28, + 3.4 
Sample E, A 2.60, Р ж 32.3 
449: sn 53 
АП these were taken from the same small host tree, with injured 
trunk and several dead limbs, but with the living parts apparently 
