GYMNOSPERMS ON STANFORD GROUNDS ABRAMS 93 



face with rounded apophysis, those on the lower surface with nearly flat 

 apophysis ; prickles very minute ; seeds black, ^ inch long, half the length of 

 the wing. 



Tree 80 to 100 feet, broadly pyramidal or with round- topped head. Na- 

 tive of the coast of California and abundant at Monterey. Commonly culti- 

 vated on the University grounds. 



15. Pinus muricata Don. Prickle-cone Pine. 



Leaves bright green, rather stout, 4-6 inches long, strongly serrate; 

 cones 2-2J^ inches long, very unsymmetrical by the enlargement of scales on 

 outside; prickles prominent; seeds }i inch long; wings J4 inch long. 



A compact pyramidal or branching tree 50 to 90 feet high, with dense 

 foliage. Native of the California coast. Specimens are among the pines 

 between the Post Office and the Quadrangle. Others were formerly back of 

 the Chemistry Building. 



16. Pinus halepensis Ait. Aleppo Pine. 



Leaves dull green, very slender for the group, 2J/2-3 inches long, tufted 

 at the end of the branches; cones conical, smooth, 2J/2-3 inches long, deep 

 lustrous brown ; scales flattened, ^ inch broad ; apophysis but slightly thick- 

 ened, flat and smooth, except for a rather faint transverse ridge. 



A low spreading tree with an open, thin and straggling aspect, 20-40 feet 

 high. Native of the Mediterranean region, extending from Portugal to Asia 

 Minor. Several trees are planted in the Arboretum; one especially fine 

 specimen is between the Mausoleum and the Museum. 



16a. Pinus halepensis Pityusa Stevens. 



Larger tree than the typical form, with leaves 4-5 inches long and cones 

 3-5 inches long. 



Native of the eastern Mediterranean region. Specimens are south of 

 the Niursery. 



17. Pinus Pinea L. Italian Stone Pine. 



T,eaves stout, straight, deep shiny green, 5-8 inches long; cones 5-6 

 inches long, broadly ovate, lustrous brown; scales thick and heavy, 1 inch 

 broad; apophysis but slightly elevated, often 6-sided; umbo with a short 

 blunt prickle; seeds ^ inch long, with broad but very short wings. 



Tree 25-60 feet, with a broad, rounded head. Common on the sandy 

 shore of Tuscany. One tree is north of the Nursery lath-house. 



18. Pinus Pinaster Ait. Cluster Pine. 

 Leaves glossy green, very stout, stiff and twisted, acute, 5-9 inches long, 

 appearing in definite and somewhat remote bands; cones, in the older trees, 



