90 DUDLEY MEMORIAL VOLUME 



cylindric, 2-4 inches long; scales oblong-obovate, flexible; seed reddish 

 brown, mottled with black, % mcn l n g; wings 4 times as long, acutish. 



A native of eastern America, extending from Newfoundland to Mani- 

 toba, south to Georgia and Iowa. Specimens are along Pine Avenue, be- 

 tween University Avenue and the automobile road and in the nursery south 

 of the lath-house. 



3. Pinus monticola Don. Mountain White Pine. 



Branchlets puberulent, yellowish or reddish brown; leaves stiff, bluish 

 green and glaucous, 1^-4 inches long; cones short-stalked, cylindric, 5-11 

 inches long, yellowish brown ; scales pointed by the slightly thickened umbo ; 

 seeds ^ inch long, reddish brown, mottled with black; wings 3 times as 

 long, acute. 



A native of western America, extending from British Columbia to Idaho 

 and the high mountains of California. One tree east of Cactus Garden, 

 a few others are scattered through the Arboretum. 



4. Pinus Lambertiana Dougl. Sugar Pine. 



Branchlets pubescent, brown; leaves ^ inch long, stout, sharp-pointed, 

 dark bluish green with conspicuous white lines on back; cones on stalks, 

 2-3 l /2 inches long, cylindric, light brown, shiny, 10-20 inches long; seed 

 l /2 inch long, dark brown or nearly black; wing rounded at apex. 



A Pacific Coast species, extending from southern Oregon to northern 

 Lower California. The largest and most magnificent of all the pines. 

 Several trees are north of the Angel of Grief, and one or two fairly large 

 trees are north of the Stanford Residence. 



5. Pinus Cembra L. Swiss Stone Pine. 



Branchlets with yellowish brown tomentum; leaves straight, dark green 

 on back, bluish white inside, 2-3^ inches long; cones short-peduncled, 

 ovate, light brown, 2 l / 2 -Z l / 2 inches long; scales rounded at apex; apophysis 

 much broader than high; seed l / 2 inch long. 



Native of the Alps and extending northward to Russia and northern 

 Asia, where it attains 70 or occasionally 120 feet. One small tree which has 

 not fruited is at the entrance of the Cactus Garden. 



6. Pinus quadrifolia Parl. Parry's Pinon. 



Branchlets puberulous, light grayish brown; leaves 3-5 (usually 4), rigid, 

 incurved, light green on back, whitish inside, 1^-2 inches long; cones sub- 

 globose, \y 2 -1 inches long, chestnut brown; apophysis thick, pyramidal, con- 

 spicuously keeled: umbo with minute recurved prickle; seed l / 2 inch long. 



