j6 WEST AMERICAN OAKS. 



Remarks. It may be hoped that the two plates now published, exhibiting so clearly 

 the distinctions between Q. Jacobi and Q. Garryana will unable future explorers of those 

 northwestern regions to identify the former, wherever it may be found, and so eventually 

 determine its full range. 



The two oaks differ almost as much in their acorns as in their leaves ; those of Q. 

 Jacobi hciing smaller and ovate, while those of Q. Garryana, just as shown at Plates VII 

 and XXXIV of this work, are thickest above the middle, i. e. obovate-oblong rather than 

 ovate. They are sometimes almost oval, but I believe never ovate. 



The volume in which Q. Jacobi was published appears to be rare in this country; and 

 I have had both trouble and long waiting to obtain it. I shall therefore reproduce Mr. 

 Brown's most important remarks concerning it : 



*' The only place where I ever observed it was in the southeastern district of Van- 

 couver Island, on the lawn and close to the house of Sir James Douglas, along with trees 

 of its close all}' Q. Garryana, which afforded excellent material for comparison. The 

 leaves of the species under notice, instead of being long and with three or four almost 

 equal shallow lobes, acutely cut at the bottom, were more palmate, with five lobes, deeper 

 and smaller than in Q. Garryana, the basal ones being broadest, the breadth of the leaf 

 greatest at the middle. The form of the tree is also different. Instead of, as in Q. Garryana 

 being bare of branches for almost twelve feet, it branches out near the base, the branching 

 being much more umbrageous than in Q. Garryana. I was informed that the acorns were 

 also different ; and the one comes into leaf and flower later than the other. 



Sir James Douglas, who was at that time Governor of British Columbia and Vancouver 

 Island, had for many years noticed these trees growing alongside of Q. Garryana, and was 

 quite convinced of the specific difference of the one to which, in memory of his long and 

 unvarying kindness to me and other naturalists during our exploration of Northwest 

 America, and in respect for the character of the founder of our North Pacific Colonies, I 

 have attached his name." 



The leaf and acorn of true Q. Garryana reproduced in figure 2 of Plate XXXVI 

 were brought by the writer from near Eugene City, in the southern part of Oregon ; a 

 point lying in what is about the centre of distribution for this species. David Douglas' 

 type was from the Columbia River. 



