SEQUOIA AXD ITS HISTORY. 221 



stances. I propose therefore, if the Association does 

 me the honor to print this discourse, to append in a 

 note a list of the more remarkable ones. 1 But I would 

 here mention certain cases as specimens. 



Our Rhus Toxicodendron, or poison-ivy, is very 

 exactly repeated in Japan, but is found in no other 

 part of the world, although a species much like it 

 abounds in California. Our other poisonous Rhus (R. 

 venenata), commonly called poison-dogwood, is in no 

 way represented in Western America, but has so close 

 an analogue in Japan that the two were taken for the 

 same by Thunberg and Linnaeus, who called them both 

 R. vernix. 



Our northern fox-grape, Yitis Labrusca, is wholly 

 confined to the Atlantic States, except that it reap- 

 pears in Japan and that region. 



The original Wistaria is a woody leguminous 

 climber with showy blossoms, native to the middle 

 Atlantic States ; the other species, which we so much 

 prize in cultivation, W. Sinensis, is from China, as its 

 name denotes, or perhaps only from Japan, where it is 

 certainly indigenous. 



Our yellow-wood (Cladrastis) inhabits a very lim- 

 ited district on the western slope of the Alleghanies. 

 Its only and very near relative, Maackia, is confined 

 to Mantchooria. 



The Hydrangeas have some species in our Alle- 

 ghany region : all the rest belong to the Chino- Japan- 

 ese region and its continuation westward. The same 

 may be said of Philadelphus, except that there are one 



1 The tabulated list referred to was printed as an appendix to the 

 official edition of this discourse, but is here omitted. 



