PINACEAE 23 



American species Pseudotsuga mucronata is the most important timber 

 tree on the Pacific Coast of N. America and it may be worthy of 

 introduction into temperate parts of China for extensive cultivation as a 

 timber tree. 



Pseudotsuga sinensis Dode 



Tall tree with deeply furrowed bark and pubescent branchlets. The 

 leaves are emarginate at the apex. Cones about 5 cm. long. 



S. W. China. 



KETELEERIA 



Evergreen tree of pyramidal habit when young, in age with wide- 

 spreading, massive branches, forming an irregular flat-topped tree. Bud 

 not resinous, with numerous imbricated scales as an enveloping sheath at 

 its base, after the branchlet has developed. Branchlets smooth. Leaves 

 in 2 ranks by the twisting of the leaf bases, flat, linear, acute, green, 

 keeled and not grooved on the upper surface, with a narrow stalk con- 

 tracted to a circular disk at the base. Flowers monoecious. Staminate 

 flowers in clusters, each flower composed of numerous 2-celled anthers 

 on a stipitate axis. Cones erect, maturing in 1 year with upright, 

 persistent scales woody in texture. Scales laciniate. Seeds 2 to a scale, 

 with hatchet-shaped wings, as long as the scale. 



A genus containing 2 species in China, differing from Abies by the 

 clustered staminate flowers, by the cone with persistent scales and by 

 the leaves, which are keeled or ridged on both surfaces and not depressed 

 above. From Pseudotsuga it is distinguished by the erect cone and 

 clustered staminate flowers. 



Superficially the leaves of Keleleeria resemble those of Cephalotaius 

 but when the leaves of Keleleeria fall they leave a circular flat or slightly 

 concave scar, the bark becoming scaly in the second year, while in 

 Oephalotaxus the leaf scars are smaller, oval or irregular in outline and 

 the elongated bark-like leaf bases persist as a covering of the twigs until 

 the third or fourth year. Keleleeria is chiefly valuable as an ornamental 

 tree and is planted in China near wayside shrines and tombs. The wood 

 is locally useful. Propa'gated by seeds and cuttings. Cultivated in 

 Europe and America. 



