206 UNITED STATES AND MEXICAN BOUNDAEY. 



Q 



foliis oblougis profunde sinuato-pinnatifidis utrinque 



obtusisj lobis (utrinque 2-3) 



fructibus solitanis geraiuisque, glande oblongo-ovata apiculata. liocky ravines near the mouth 

 of the Pecosj and on the Limpio : Bigeloiu. Oak Creek, Texas ; Schott. Differs from the 

 common state of Q. coccinea in the coDsiderablj smaller and less lobed leaves, in the acorns 

 being scarcely one-third as large, tbe cup not turbinate, and the gland longer in proportion to 

 its breadth. 



QuERCUS NIGRA, Liuu. ; Michx.f. Sylv. 1, t. 20 ; Torr. FL N. York^ 2jp. 188, t. 105. Medina 

 Creek, above San Antonio, Texas ; Parry. This appears to be the western limit of the Black- 

 Jack Oak. 



QuERCUS OBTusiEOLiA, var.? breviloba: foliis subcoriaceis obovato-oblongis basi cuneatis, lobis 

 brevibus obtusis supra viridibus subtus pallidis pubescentibus ; fructibus sessilibus solitariis vel 

 geminis, cupula depressa bemispberica, glande oblongo-ovato obtusa. — Mountain gorges near 

 Howard's Springs, western Texas ; Bigeloio. We refer this oak to Q. obtusifulia with mucb 

 doubt, but it seems more nearly allied to tbat species than to any other. It differs, bowever, in 

 its leaves being mucb smaller and far less lobed, more coriaceous and apparently evergreen. 

 The acorns, too, are smaller and the cup more sballow. 



QuERCus uxDULATAj Tovr. in Ann. Lye. N. YorTc^ 2, p. 248, t. 4t\ & in 31arcy's Rep. p. 297. 

 Q. Fendleri, Liebm. ?. c. p. 170. — Kew Mexico, near tbe Rio Grande. (No. 805 and 807, Fendl. 



N. Mex. Coll.) 



QuERCUs viREXS, Ait.; Michx.f. Sylv, 1, p. 57, t. 12. Moist woods on tbe Gulf coast from tbe 

 Brazos to tbe Eio Grande, also along the latter river as bigh as the Pecos and Live Oak Creek. 

 At a distance from tbe coast it is commonly a shrub 4-6 feet bigb. The leaves vary from nar- 

 rowly oblong to broadly ovate. On old trees tbey are mostly entire, but on young shoots they 

 are often sbarply tootbed. 



QcERCUS Emoryi, Torr. in Emory's Rep. p. 152, t. 9. 

 p. 171. Near the mouth of the Pecos and on the Limpio, 

 Thurhtr. Sonora ; Schott & Copt. E. K. Smith. — A widely spread sbrubby evergreen oak, with 

 neat foliage and very small acorns. The small-leaved oak of Fremont^ quoted hy Liebmann 

 under his Q. chrysolepis, seems to be a variety of tbis species. No. 664, Wright, belongs to the 

 form called Q. pungens by Liebmann, in wbich the leaves are more deeply toothed or lobed 

 than in the normal state. 



QuERCUs AGRiFOLiA, Nee in Ann. de Oienc. Nat. 3, p. 281, fide Liebm.; Hook. Ic. 3, t. 377, Q. 

 oxyadenia, Toi^r. in Sitgr. Rep. t. Vjj & Bot. Whippl. Rep. p. 138. Common on the mountains 



Q. pungens, & Q 



Chihuahua: 



from tbe Unner Sacramento 



East of San 



Diego Dr. Parry saw trees of this oak which were 30 or 40 feet bigb. Wh 

 it has a round top like the Live Oak, throwing out branches a few feet fr( 

 extending 30 feet or more from the trunk. 



Q 



Torr. in Sitgr. Rep. p. 173, t. 19. Q. grisea, Liebra. I. c. p. 171. 



{B 





e east of San Diego, Cali- 



Mexi 



fornia ; Parry. In Texas and western New 

 bigb ; but in California it sometimes attains tbe height of 20 or 30 feet. It has pale bark and 

 spreading branches. The acorns vary considerably in form. To this species I refer No. 665 

 and 1866, Wright. 



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