188 WILSON EXPEDITION TO CHINA 



tected; that is, when firewood is needed they are generally spared. In a few places 

 mountaineers have even made small plantations near their houses of the Hickory 

 and of a red-fruited Comus. The Hickory trees thrive best at the foot of the moun- 

 tains and in narrow moist valleys where they grow in deep rich hmnus. They 

 love shelter and when exposed to much wind they become crippled. Apparently 

 they cannot stand much frost. They grow with Liquidambar formosana, Castanea 

 mollissima, Diospyros kaki, Pistacia chinensis, Albizzia species, Aleurites Fordii 

 and Pinus Massoniana. The colloquial name for this tree is Shan-gho-to." 



In China there are many endemic trees, but in eastern North America, now that 

 Carya has been found in China, Sabal, Platanus (found also in Europe and western 

 Asia), Robinia, Oxydendrum, Arbutus (found also in Europe and western Asia), 

 Kalmia, Pinckneya, Taxodium and Chamaecyparis are the only genera of eastern 

 American extratropical trees which are not also represented in eastern continental 

 Asia. In China, however, Taxodium appears in the closely related Glyptostrobus 

 which some botanists consider a Taxodium, and Chamaecyparis, although it has 

 not yet been found in China, occurs in Japan and Formosa. 



