^ 



Plate XXX. 

 QUERCUS UNDULATA, Torrey. 



Remarks. The present Plate has been engraved from specimens collected by the 

 writer as long ago as 1873, near Canon City, Colorado. The locality, although the most 

 northerly one recorded for the species, is probably not more than a hundred and twenty or 

 thirty miles from where Dr. Edwin James so long ago made the original discovery of the 

 shrub. Dr. Britton has assured me that the branches here figured exactly correspond 

 with the type specimens in the Torrey Herbarium. He also adds the significant note that 

 no specimens exist there which answer to the engraving published in the Annals of the 

 New York Lyceum. In view of these facts it has seemed very desirable that a new 

 drawing, from authenticated specimens, should be made; and by an artist who, thoroughly 

 appreciating the scientific value simple truthfulness in all such work, would add no grace or 

 comeliness not borne by the scraggy bush itself. That we were not able to furnish 

 Mr. Hansen with acorns of the species is particularly to be regretted, since those of the 

 original figure referred to are manifestly somewhat conventional. 



Concerning what should be regarded as the proper limit of Q. undulata phytographi- 

 cally and geographically considered, I begin to be in doubt. Perhaps the arboreal oak, Q. 

 oblongifolia of Torrey which a year ago I followed Dr. Engelraann in referring here as a 

 variety may be proven specifically distinguishable ; but as Professor Sargent has lately 

 said', it is a problem not to be solved until field work upon the oaks of southern New 

 Mexico and Arizona shall have been renewed and perseveringly continued. 



I "Garden & Forest," ii. 471. 



