30 University of California Publications in Zoology. |Vou.5 
north-facing slope to the south of Bear valley. I saw a few in 
some ravines on the north side of Bear valley, and on the south 
side of Holcomb valley. All around Sugarloaf, especially on the 
north slope from 8000 to 9000 feet altitude, it was abundant. 
On the north side of Gold mountain near the top I saw a number 
of fir trees, a few of which were loaded at their summits with 
ereen cones, August 26, 1905. In no other place and in no other 
year did I see this tree fruiting. The largest fir we saw was at 
Bluff lake; it measured 23 feet in circumference 4 feet above the 
ground, and 167 feet in height. (See pls. 48, 10, 114, 118.) 
Libocedrus decurrens Torrey. 
The incense Cedar was a conspicuous conifer along canons 
and streams on the Pacific side of the mountains from 5000 to 
7000 feet altitude. Along upper Mountain Home creek, and 
along the Santa Ana from Seven Oaks nearly to Big Meadows, 
and in lower Fish ereek, Lost creek, and South Fork canons it 
was common. Around Bluff lake and on either side of Bear lake 
it was less numerous, and I did not note it at all farther toward 
the desert. This is a Lower Transition species. (See pl. 114.) 
Pseudotsuga macrocarpa (Torrey) Mayr. 
The big-cone spruce was found only on the Pacific side of the 
mountains growing on shaded slopes in the Upper Sonoran zone 
and up into the lower part of the Transition, 2000 to 5700 feet 
altitude. In all the lower canons it was common, the highest 
being seen in lower Bear creek canon, along the upper Santa Ana 
nearly as far as Seven Oaks, and along the north base of San 
Bernardino peak well up Foresee creek, as high at least as 5700 
feet. 
Pinus Coulteri Don. 
The Coulter or big-cone pine was seen along lower Mill creek, 
and on dry slopes, often in the chaparral belt (Upper Sonoran), 
in the vicinity of Clarke’s ranch and Seven Oaks. A few were 
noted as high as 5600 feet altitude in the Lower Transition zone 
near our Cedar Cabin camp on the upper Santa Ana. 
