JOURNAL 



OF THE 



ARNOLD ARBORETUM 



Volume IV JULY, 1923 Number 3 



ENUMERATION OF THE LIGNEOUS PLANTS OF NORTHERN 



CHINA. 



Alfred Rehder 

 GiNKGOACEAE TO RANUNCULACEAE 



During the last ten or fifteen years several important collections of 

 plants from northern China have been received at the Arnold Arboretum, 

 the most extensive being those made by W. Purdom, F. N. Meyer, J. Hers 

 and R. N. Cowdry. In the course of the determination of these collections 

 which have greatly extended our knowledge of that flora it has appeared 

 desirable to make a complete survey of the known ligneous plants of the 

 region. 



Northern China as here understood includes the six northern provinces 

 Chili, Shantung, Honan, Shansi, Shensi and Kansu; it borders north on 

 Manchuria and Mongolia and south on the Chinese provinces Kiangsu, 

 Anwhei, Hupeh and Szechuan and extends from the Yellow Sea to the 

 high table land of Tibet. The whole area is situated between 100° and 

 123° E. Long, and 32° and 42° N. Lat. and is traversed by a mountain 

 range running from east to west with a bend to south or southwest in 

 Shansi, reaching in the Tsing ling shan an altitude of about 3350 m. and 

 connecting in Kansu with the high mountains of the Tibetan border; it 

 is drained chiefly by the system of the Hwang ho or Yellow^ River. An 

 account of the phytogeography of the region, the relation of its flora to that 

 of the neighboring regions, the history of its botanical exploration and other 

 important facts on the botany of the region will be given at the conclusion 

 of the systematic enumeration which is based chiefly on the collections at 

 the Arnold Arboretum and includes references to the literature previously 

 published on the ligneous plants of the region. Under each species and 

 variety there are given, besides the original place of publication of the 

 names, only such citations as contain references to the occurrence of the 

 plant under consideration in northern China. No attempt is made to 

 cite all the synonyms, but in most cases a reference is given to a place 

 where a complete enumeration of synonyms can be found. 



GINKGOACEAE 



Ginkgo biloba Linnaeus, Mant. Alt. 313 (1771). — Debeaux in Act. Soc. 

 Linn. Bordeaux, xxxiil 66 (Fl. Tien-tsin, 43) (1879). — Faber in Denkschr. 



