STANDLEY TREES AND SHRUBS OF MEXICO. 185 



39. Quercus greg'g'ii (A. DC.) Trel. 



Quercus reticulata, greggii A. DC. in DC. Prodr. 16 ^ 34. 1864. 



Coahuila ; type locality, San Antonio, near Saltillo. 



Rather small evergreen trees with moderate, tomentose or more or less 

 glabrescent twigs and small hairy buds; leaves rather small (3 to 5 cm. wide. 

 4 to 7 cm. long), rugose, revolute, granular or puberulent on the midrib above, 

 rusty stellate-fleecy beneath, shortly elliptic-obovate, mucronately very obtuse, 

 cordate, short-petioled, entire or slightly repand above ; acorn conic-ovoid, about 

 10 mm. in diameter and 20 mm. long, the shallow cup with acute appressed 

 scales. 



40. Quercus aculcingensis Trel. 



Quercus reticulata crassifolia Oerst. in Liebm. Chenes Amer. Trop. 20. 1869. 



Oaxaca ; type locality, Puente Colorado on the Cuesta de Aculcingo. 



Twigs moderate, dingy-woolly ; buds small, glabrate ; leaves deciduous, small 

 (2 cm. wide. 4 cm. long), rugose, revolute, densely tomentose beneath, the 

 midrib granular above, elliptic, rather obtuse at both ends, short-petioled, entire ; 

 fruit unknown. 



41. Quercus diversifolia Nee, Anal. Cienc. Nat. 3: 270. 1801. 

 Quercus tomcntosa dirersifolia A. DC. In DC. Prodr. 16 ': 33. 1864. 

 Type locality, between Chalma and Santa Rosa, Veracruz. 



A scarcely placeable shrub, said to be 3 to 5 meters high, with rather small 

 leaves (2 cm. wide, 2.5 to 7 cm. long) tomentose beneath, ovate, oblong, or 

 elliptic in outline, and subentire to crenate-dentate on the same branch ; fruit 

 on a petluncle 5 cm. long. 



42. Quercus microphylla Nee, Anal. Cienc. Nat. 3: 264. 1801. 

 Guanajuato. Hidalgo, and Mexico ; type from Guana.iuato. 



Intricately branched deciduous low shrub with slender tomentose twigs and 

 glabrescent ovoid buds 2 mm. in diameter and 4 to 5 mm. long ; leaves small 

 (1 to 2 cm. wide. 2 to 4 cm. long), rugose, revolute, and concave, scurfy above, 

 woolly beneath, elliptic-oblong, mostly obtuse at both ends, very short-petioled, 

 entire or undulate or crenately toothed above ; acorn ovoid, 10 mm. in diameter, 

 15 mm. long, one-third or more included, the half-round cup with acute ap- 

 pressed scales. . " Ehcina capulincillo " (Mexico, Ramirez). 



43. Quercus repanda Humb. & Bonpl. PI. Aequin. 2: 31. 1809. 



Hidalgo and adjacent San Luis Potosi; type locality. El .Tacal, between Real 

 del Monte and Moran, Hidalgo. 



Intricately branched subevergreen shrub with slender tomentose twigs and 

 small glabrescent buds; leaves small (1 to 2 cm. wide, 3 to 4 cm. long), rugose, 

 undulately revolute, sparingly scurfy above, woolly beneath, elliptic to ovate or 

 obovate, commonly obtuse at both ends, very short-petioled, entire or sparingly 

 low-toothed above; acorn round-ovoid, 10 nmi. in diameter, 12 to 15 mm. long, 

 nearly half included, the rounded cup with acute appressed scales. " Encina," 

 " encina negra." "encina chaparro " (Hidalgo). 



44. Quercus intricata Trel. 



Quercus microphyUa crispata A. DC. in DC. Prodr. 16': 36. 1864. Not Q. 

 crispata Steven. 1857. 



Coahuila and adjoining Zacatecas ; type locality, Buena Vista, near Saltillo, 

 Coahuila. 



Intricately branched deciduous shrub with slender tomentose twigs and small 

 glabrescent buds; leaves small (scarcely 1 to 2 cm. wide and 3 to 5 cm. long), 

 crisped and revolute, stellate-scurfy above, closely tomentose beneath, subellip- 



