94 DUDLEY MEMORIAL VOLUME 



clustered, conic-oblong, 4-7 inches long; apophysis nearly ^ inch broad, low- 

 pyramidal, conspicuously keeled with a prominent triangular umbo; seed Ys 

 inch long ; wing about 1 inch long. 



Tree 100 feet high with regular pyramidal habit and rapid growth. 

 Native of the coastal region of southern Europe. A variety has been exten- 

 sively used in Eiirope to reclaim wastes of maritime sands. Several trees are 

 in the row of pines between the Post Office and the Quadrangle. A hand- 

 some specimen is in the rear of Madrone Hall, and a few trees are south of 

 the Nursery. 



19. Pinus nigra Arnold. Austrian Pine. 



Leaves stout and very rigid, 1J4-2J^ inches long, abruptly sharp-pointed, 

 rounded on the back, deeply grooved beneath, dark green; cones 2^ inches 

 long, light brown; scales about 1 inch long, ^ inch broad; apophysis low- 

 pyramidal, slightly keeled and with a minute prickle. 



This species is more generally known under the name Pinus Austriaca. 

 It is a native of southeastern Europe. A small tree is southwest of the 

 Nursery lath-house. 



20. Pinus sylvestris L. Scotch Pine. 



Leaves light green, flattened and twisted, stiff. 1-1 J4 inches long; cones 

 2-2 J4 inches long, light brown; scales yi inch broad; apophysis, at least of 

 the middle scales, with a dorsal knob-like, keeled and truncated thickening, 

 and a thin, somewhat recurved apex; seed %. inch long; wing narrow, acute. 



A forest tree 70-100 feet high, with pyramidal head and scattered foli- 

 age. The Scotch Pine is one of the important timber trees of Europe. 

 Several trees are in the Nursery north of the lath-house, and one is in about 

 the middle of the Arboretum near University Avenue. 



21. Pinus montana Mill. Swiss Mountain Pine. 



Leaves stout and crowded, ^-2 inches long, bright green, acutish ; cones 

 %-2j4 inches long, light grayish brown; apophysis low-pyramidal, with a 

 black band surrounding the umbo. 



A variable species, often a low dwarf shrub, or sometimes a pyramidal 

 tree 40 feet high. Native of the mountains of central and southwestern 

 Europe. One dwarf specimen is on the west side of the Cactus Garden. 



2. Cedrus. Cedars. 

 Large forest trees, with stiff 4-sided, more or less sharply-pointed leaves 

 in clusters at the ends of short, stubby lateral branchlets. Flowers monoecious, 

 erect; cones ovate, 3-5 inches long, with broad, thin, closely imbricated 

 scales. 



