(323) 
Pirate G 
Pinus Sabiniana, Oakgrove Canyon, Liebre Mountains, altitude 1400 
meters. Upper Austral Zone. 
Piate 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. 
Pruate I 
Cleistoyucca arborescens, Mohave Desert, between Mohave and Lancaster, 
altitude about 800 meters. Lower Austral Zone. 
Puate J 
Fig. 1. Covillea dei ae Willow Springs, Antelope Valley, altitude 
ean 840 meters. Lower Austral Zone 
2. Olneya ae eastern base at Signal Mountain, Colorado Desert, 
Pre. 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 ss first year 
Cones pendulous; leaves short-petioled. S Piene ube: 
Cones erect; leaves sessile. ri 7 
1. PINUS. Pine. 
Sheaths deaduous: leaves with 1 fibro-vascular bundle. 
eaves in 5’s. 
Leaves slender, 8-10 cm. long; cones ae 20-40 cm. long; 
wing of seed 2 cm. lon P. Lambertiana. 
Leaves rigid, 3-6 cm. ae cones oval, a? cm. long; wing a narrow 
ring, I mm. broad. 2. P. flexilis. 
Leaves 1-4 in a cluster; cones globose; scales much thickened; seeds 
arge. 
Leaves ses in 4’s. : P. quadrifolta. 
Leaves solit 4. P. monophylla. 
Sheaths Pe oe with 2 fibro-vascular sic 
Leaves in 5’s, wing thickened. . P. Torreyana, 
Leaves in 2’s or 3’s; wing thin. 
Leaves in 3’s. 
Cones aaa scales tipped with a prickle. 
s 7-12 cm. long. 6. P. ponderosa. 
