* * Evergreen Species. 



Plate XIII, Figures 3 and 4. 



QUERCUS UNDULATA, Torrey. ' 



Bibliography. 



QuERCUS UNDULATA, Torr., Ann. Lye. New York, ii, 248, t. 4 (1827). 



, Nutt. N. Am. Sylv. ed. 2, 19, t. 3 (1842). 



, A. De Candolle, Prodr. xvi% 23 (1864). 



QuERCUS UNDULAT.\ Jamesii, Engelm., in Trans. St. Louis Acad, iii, 382 (1876). 

 , Coulter, Man. Rocky Mt. Bot. 333 (1885). 



Description. A low evergreen shrub with numerous rigid branches; leaves an inch 

 or two long, oblong, coarsely and pungeutly toothed or lobed, densely stellate-tomentose 

 beneath, scarcely at all so above: fructification annual: acorns mostly solitary, sessile; 

 cup hemispherical, its scales appressed; nut ovate, acute, more than half exserted. 



Habitat. From the sunny cafions of Southern Colorado southward to New Mexico 

 and westward into Arizona; at its southern limit becoming the arboreal oak of that region, 

 which has been named variously, Q.grisea and Q. oblongifolia^ both of which names should 

 be suppressed in favor of Q. undulata, which has priority. 



Remarks. Dr. Kellogg's specimens are of Mr. Lemmon's collecting in Arizona. 



The figure in the Annals of the New York Lyceum I have not seen. That in Nut- 

 tail's Sylva is said, by Dr. Engelmann, to be a modification of it. I know of no oak-leaf 

 quite like that which Nuttall has figured. It looks like something intermediate between 

 an evergreen and a deciduous species. Possibly that Plate may have played a part in the 

 confusing of the two species, Q. imdulata and Q. Gambelii in the minds of several 

 authors. 



