(323 ) 
Piate G 
Pinus Sabiniana, Oakgrove Canyon, Liebre Mountains, altitude 1400 
meters. Upper Austral Zone. 
Puate H 
Looking northeast across San Bernardino Valley, with Slover Mountain 
in the foreground and the San Bernardino Mountains in the distance. The 
valley is Lower Austral; the chaparral-covered slopes of the distant moun- 
tains, Upper Austral; the forests on the summits, Transition. 
Puate [ 
Cleistoyucca arborescens, Mohave Desert, between Mohave and Lancaster, 
altitude about 800 meters. Lower Austral Zone. 
PuaTeE J 
Fig. 1.  Covillea iridentata, near Willow Springs, Antelope Valley, altitude 
about 840 meters. Lower Austral Zone. 
Fig. 2. Olneya Tesota, eastern base of Signal Mountain, Colorado Desert, 
altitude about sea level. Lower Austral Zone. 
ANNOTATED CATALOGUE OF THE SOUTHERN 
CALIFORNIA TREES AND SHRUBS 
PINACEAE. Pine Famity. 
Leaves usually fascicled, surrounded at base by a sheath; cones maturing 
the second year. 1. Pinus. 
Leaves not fascicled, without basal sheath; cones maturing the first year. 
Cones pendulous; leaves short-petioled. 2. Pseudotsuga. 
Cones erect; leaves sessile. 3. Abies. 
I. PINGS.) Pine: 
Sheaths deciduous; leaves with 1 fibro-vascular bundle. 
Leaves in 5’s. 
Leaves slender, 8-10 cm. long; cones cylindrical, 20-40 cm. long; 
wing of seed 2 cm. long. 1. P. Lambertiana. 
Leaves rigid, 3-6 cm. long; cones oval, 8-16 cm. long; wing a narrow 
ring, I mm. broad. 2. P. flexilis. 
Leaves 1-4 in a cluster; cones globose; scales much thickened; seeds 
large. 
Leaves usually in 4’s. 3. P. quadrifolia. 
Leaves solitary. 4. P. monophylla. 
Sheaths persistent; leaves with 2 fibro-vascular bundles. 
Leaves in 5’s, wing thickened. 5. P. Torreyana. 
Leaves in 2’s or 3’s; wing thin. 
Leaves in 3’s. 
Cones deciduous; scales tipped with a prickle. 
Cones 7-12 cm. long. 6. P. ponderosa. 
