14 KEY AND FLORA 



forming, when ripe, roundish or oblong woody cones, con- 

 sisting of 6-10 very thick, shield-shaped scales, fitting closely 

 together ; cones maturing in two years in all except the last ; 

 ovLiles numerous, in several rows at the base of the scales, 

 forming acutely angled seeds. Leaves evergreen, scale- 

 shaped, imbricated. When the tree is allowed to grow 

 naturally, it is pyramidal, or roundish, with rather loose, 

 straggling branches and pointed or rounded at the top. In 

 bloom in winter or early spring. 



a. C. macrocarpa Hartweg. Monterey Cypress. This has 



dense foliage and oblong cones clustered on short stems. It is 

 extensively cultivated throughout CaHfornia for wind breaks and 

 hedges; also trimmed into the most fantastic shapes, which are 

 supposed to be ornamental. 



b. C. Govenia'na Gordon. Mountain Cypress. This is a more 

 loosely branched and smaller tree, with the upper branches slender 

 and drooping. The cones are an inch or less long, and are globose, 

 rarely oblong. This, too, is cultivated. In its native state it grows 

 throughout the Coast Mountains. 



c. C. Macnabia'na Murr. Tliis is a small tree with fine foliage very 

 fragrant, sprinkled all orer ivith irhite glands, so that the tree is pale 

 green. The cones are small, ic'th horn-like projections on the scales. 

 This also is cultivated, but rarely. It is a native of the mountains 

 of Lake County. 



d. C. Lawsonia'na Murr (Chamaecy'paris). Port Orford Cedar. 

 This differs from the other species of Cupressus in having flattened, 

 2-ranked branches, and the cones ripening in one year. Cones very 

 small, ^ of an inch in diameter, globose, with 8 or 10 flat scales which 

 are bluish green when j^oung. Seeds 2-4 to each scale, somewhat 

 winged. This is a tall, symmetrical tree with slender branches, 

 often drooping. It is frequently cultivated and is a very valuable 

 timber tree. The wood is very fragrant and is used in making chests 

 and cupboards where it is desirable to keep out insects. It is also 

 known as Oregon Cedar and Ginger I^ine. It is found chiefly in the 

 Coast Mountains of Oregon. 



III. THU'YA, Arbor-vitae 



Monoecious. Staminate flowers numerous, very small, with 

 3 or 4 pollen sacs at the base of the 4-6 pointed scales. 

 Fertile clusters at the ends of branchlets. Cones very small, 

 ■^ inch long, soon reflexed, ripening in one year, with 8-12 erect 



