GYMNOSPERMS ON STANFORD GROUNDS ABRAMS 105 



Cones maturing the first year ; seeds few to each scale. 



14. ChamcEcyparis. 

 Cones becoming fleshy and berry-like. 15. Juniperus. 



10. Thuyopsis. 



Evergreen forest tree with a pyramidal head. Leaves decussately oppo- 

 site, convex above and somewhat sac-like. Flowers monoecious, solitary and 

 terminal; staminate cylindric; cone subglobose, with 8-10 wedge-shaped 

 scales; seeds 5 to each scale, compressed. 



A monotjrpic Japanese genus. 



1. Thuyopsis dolabrata Sieb. & Zucc. Hatchet-leaved Arborvitae. 



Leaves glossy green above, silvery white beneath, rounded at apex, the 

 upper and lower appressed, the lateral spreading, hatchet-shaped; cones J^ 

 inch long ; scales reflexed at apex. 



A native of canyons and moist slopes of Japan. Two young trees are 

 at 9 Lasuen St. 



11. Libocedrus. 



Evergreen aromatic trees, with fibrous bark and flattened spray-like 

 branchlets. Leaves scale-like, imbricate in 4 rows. Flowers monoecious; 

 staminate with 12-16 stamens; pollen-sacs 4. Cones oblong, with 6 scales, 

 the lower pair much reduced, only the middle pair fertile; seeds 2 to each 

 scale, winged. 



A genus of about 8 species; one is a Calif ornian species, the others are 

 in western South America, New Zealand, New Caledonia, New Guinea, For- 

 mosa and southwestern China. 



1. Libocedrus decurrens Torr. Incense Cedar. 



Leaves yellowish green, appearing in whorls of 4, the lateral nearly cov- 

 ering the obscurely pitted inner ones; cones yi inch long, about Ys inch 

 thick; scales with a short recurved mucro. 



Tree sometimes 150 feet high, with an irregularly lobed trunk tapering 

 from a broad base, and a reddish brown, fibrous bark. Native of the Sierra 

 Nevada and the inner Coast Ranges, extending from southern Oregon to 

 northern Lower California. The row of trees back of the Engineering Build- 

 ings is of this species. Other trees' are planted elsewhere on the University 

 grounds. 



12. Thuya. 



Evergreen trees with thin, scaly bark and decussate scale-like leaves. 

 Flowers monoecious; staminate ovoid, with 4-6 pollen-sacs. Cones ovoid- 



