GYMNOSPERMS ON STANFORD GROUNDS ABRAMS 91 



Tree attaining 40 feet, with spreading branches forming a rounded top ; 

 bark dark brown tinged with red, shallowly fissured. Native of the extreme 

 southern part of California and extending into the mountains of northern 

 Lower California. There are no specimens of this tree in the Arboretum, 

 but one tree which fruited in 1911 is at 17 Salvatierra Street, and another 

 small specimen is at 8 Alvarado Row. 



7. Pinus edulis Engelm. Pinon. 



Leaves in 2s or rarely 3s, stout, rigid, incurved, dark green on the back, 

 marked within by several rows of stomata, fa\ l /2 inches long, persistent for 

 3 or 4 years or sometimes longer; staminate flowers dark red; cones fal l /2 

 inches long and nearly as broad; seeds ovate, dark red-brown below, orange- 

 yellow above, % inch long ; wings ^ inch wide. 



A small tree with a divided trunk, 30 to 40 feet high. Native of the 

 southern Rocky Mountains, extending from eastern Utah and southwestern 

 Wyoming southward to the mountains of northern Mexico. One young tree 

 is in Professor Durand's garden. 



8. Pinus Torreyana Parry. Torrey Pine. 



Branchlets greenish or purplish, glabrous; leaves rigid, dark green, 

 8-12 inches long; cones broadly ovate, 4-6 inches long, chocolate-brown; 

 apophysis low-pyramidal; umbo elongated, reflexed, with a short spiny tip; 

 seed 24 inch l n g; short- winged. 



Tree 40 or occasionally 60 feet high, with spreading branches and dark 

 brown bark. Perhaps the rarest pine, known only in two small groves: 

 one is at Del Mar, San Diego County, the other is on Santa Rosa Island 

 off the coast of southern California. Good-sized trees are near the middle 

 of the Arboretum just west of University Avenue. 



9. Pinus Sabiniana Dougl. Digger Pine. 



Leaves slender, drooping, grayish green, 8-12 inches long; cones pendent 

 on stalks 2 inches long, light red-brown, 6-10 inches long; apophysis 

 pyramidal, sharply keeled, flattened at the straight or incurved apex; seeds 

 24 inch long; short-winged. 



Tree 50 to 80 feet high with the trunk usually divided into several stems, 

 forming a round-topped head. Native of the inner Coast Ranges and the 

 foothills of the Sierra Nevada, California. Specimens are in the Roble Gar- 

 den, near the Museum, and in the Nursery. 



10. Pinus Coulteri Don. Coulter Pine. 



Leaves stout, acuminate, dark bluish green, not drooping, 6-12 inches 

 long; cones short-stalked, cylindric-ovate, yellowish brown, 9-14 inches long; 



