xxxii A NATURALIST IN WESTERN CHINA 



and in another (Camellia) are found some of the most valued and 

 generally cultivated ornamental trees and shrubs. 



GuTTiFERiE. — Of this family only Ascyrum, Hypericum, and 

 Clusia appear in eastern North America, but in eastern continental 

 Asia, Ascyrum, Hypericum, Cratoxylon, Garcinia, and Calophyllum 

 represent this family. 



Tamaricace^. — With Tamarix and Myricaria in eastern con- 

 tinental Asia this family has no representative in eastern North 

 America, although one species of Tamarix is occasionally naturalized 

 in the southern United States. 



CiSTACEiE. — Hudsonia of the Atlantic coast region is the 

 woody representative of this family in the two regions. 



C0CHLOSPERMACE.E and KcEBERLiNiAN/E. — A shrubby species 

 of Amoreuxia of the former, and a species of Koeberlinia of the 

 latter, both in Texas, are the only members of these families in the 

 two regions. 



Canellace^, — A West Indian species of Canella which has 

 reached tropical Florida is the only member of this family in the 

 flora of the two regions. 



Flacourtiace^. — Without a representative in eastern North 

 America this family contributes some of its most interesting trees 

 to the Chinese flora in Xylosma, the monotypic Carrieria, Itoa, 

 and Idesia, and in Poliothyrsis. 



Stachyurace^, of which Stachyurus is the only genus, is Asiatic. 



Turnerace.^. — A shrubby species of Turnera from southern 

 Texas is the representative of this family in the two regions. 



Passiflor.e. — Although Passiflora appears in several herbaceous 

 species in the southern states, Passiflora ligulifolia Mast, of southern 

 China is the only woody species of the family in our two regions. 



Caricace^. — Carica Papaya L., now naturalized in many of 

 the warm countries of the world, is possibly a native of southern 

 Florida. 



Daphnace.e. — In this family the advantage is with eastern 

 continental Asia, as Dirca is its only American representative, 

 while in China there are species of Daphne, Edgeworthia, Wick- 

 stroemia, and Aquilaria. 



El.eagnace^. — In this family Shepherdia is American, Hippo- 

 phae Chinese, and Elaeagnus is found in the two regions. 



Lythrace.e. — ^The monotypic Decodon is the only woody plant 

 of this family in eastern North America, while in China appear 

 species of Lagerstroemia and Woodfordia, and the monotypic 

 Lawsonia. 



