* * Deciduous White Oaks continued from page 26. 



. ^ Plate XXXI. 



QUERCUS FENDLERI, Liebmann. 



Description. A loosely and irregularly branching rather slender shrub from one to 

 five feet high: branches and branchlets of more than a year's growth clothed with a smooth 

 and glabrous dark-colored bark; growing twigs stellate-tomentose: leaves membranaceous, 

 dark green and glabrate above, pale and stellate-tomentose beneath, from two to four inches 

 long, very short-petioled, of oblong outline (rarely a little broader above the middle), with 

 a few, shallow, acute, mucronulate lobes: fructification annual, but mature acorns unknown; 

 their young rudiments solitary or in pairs on a very short peduncle. 



Habitat. Mountains of southern Colorado and northern New Mexico: plentiful near 

 Trinidad, Colo., perhaps first collected by Fendler (his No. 805, teste Britton) not far from 

 Santa Fe. 



Remarks. This interesting little oak, so long confused with Q. undulata, is not only 

 altogether deciduous; its leaves are of thinner texture than those of the equally deciduous 

 Q. Gambelii; they are also of less than half the size of those of the last-named species. 

 Occasionally one meets with rather acute lobes in Q. Gambelii; yet even in this case and 

 in the herbarium as readily as in the field the light-colored bark of the branches marks 

 all the states of Q. Gambelii^ while in Q. Fendleri it is as uniformly of a dark iron-color. 

 One might well describe the twigs as blackish. 



The shades of foliage in the two, though less pronouncedly diflFerent, are perceptible 

 to any eye. When I had descended from the mountains near Trinidad, where each species 

 forms its own separate thickets, I could distinguish the several thickets of the two as easily 

 at the distance of more than a mile, as when I had been in the immediate vicinity of them, by 

 their respectively darker and lighter hues of green. Q. Gambelii even when only shrubby 

 is much larger in all its parts, and more robust, than its obscurer and much less widely 

 disseminated relative. 



The present species is one of the last which was proposed by Mr. Liebmann, and I 

 have not been able to see the paper in which it was published. 



