CHAPARRAL. 48 
10 months and was a failure. Later sowings, however, which were 
followed by wet weather, were thoroughly successful and resulted in 
a good cover. These experiments with Rhus laurina serve to em- 
phasize the fact that in the artificial extension of chaparral every- 
thing depends upon the weather conditions which follow the sowing. 
It might seem that all that would be necessary would be to wait until 
the rains begin, and then scatter the seed. Yet even if the sowing 
were postponed until the rains began it would be necessary to 
employ thousands of-men to cover any large area, and the services of 
these would have to be obtained immediately upon the start of the 
rainy season and could be used for a few weeks only. After that it 
would be problematical whether the remainder of the rainy season 
would be favorable for the germination of the seed. 
INTRODUCTION OF LARGER TREE SPECIES IN THE CHAPARRAL. 
The advisability of introducing larger tree species in the chaparral 
area has often been considered, since the chaparral, even at best, can 
not furnish as good a cover as larger trees, nor does it yield a crop of 
commercial wood. Above the chaparral is a forest composed prin- 
cipally of conifers, with a mixture of broadleafs as the chaparral is 
approached, while narrow fringes of moisture-loving broadleaf trees 
follow the streams down through the chaparral and out upon the 
plain. The following list gives the species which, with the chaparral, 
form the forest cover of southern California : 


CONIFERS. 
Pimusnatheniabae: ees Sh ee Knobeone pine. 
MUS COMUOT Aso — see Lodgepole pine. 
MNS COUN te rt ee ee 2 eh Ee Coulter pine. 
Ta Sol @xaNl TS eet eee ee Se Limber pine 
Pinus jeffreyi___ pene = Jeffrey pine. 
Pinus lambeniianas =o. ri ee Sugar pine. 
Pinus torreyana___ 
Pinus monophylla 
Pinus monticola_ 
eee 2 ine ROLTE YS pine: 
Oe EM NS sale Single-leaf pifion. 
Bhi Sheer teen Western white pine. 




PintisSE ponderosa 222 52 ee Yellow pine. 
Pinus quadritohia= = 2s" = Parry pitton: 
In SacamManae so 8 ce Gray pine. 
Pins sradiata = 22-222 >_7__ Monterey pine: 
Pseudotsuga macrocarpa________- Bigeone spruce. 
Eseudoruca taxifoliqge= =e - Douglas fir (red). 
PIN CSECONCOIOI =e 20s es a, White fir. 
pies: venusta.— 2. ___Bristle-cone fir. 
wibecedrus decurrens_—— Incense cedar. 
Cupressus goveniana____________- Gowen cypress. 
TUMPerus«calitornica = =~ ss California juniper. 
Juniperus occidentalis___________. Western juniper. 
Sequoia sempervirens_________-_- Redwood. 
