194 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



(as much as 5 cm. wide and 13 cm. long), glabrate, or with fleecy axils 

 beneath, slightly revolute, elliptic-obovate, acnte, mostly rounded at base, the 

 moderate i3etioIe pubescent, coarsely few-toothed above; fruit annual (?); 

 acorn ovoid, 10 to 12 mm. in diameter, 15 to 18 mm. long, half included, the 

 rounded cup with blunt appressed scales. 



89. Quercus affinis Scheidw. Hort. Belir. 4: 321. 1837. 



Type locality, between Regla and Istula, Hidalgo. 



Twigs slender, at first scurfy ; buds small, glabrous, glossy brown ; leaves 

 evergreen, small (2 cm. wide, 7 to 9 cm. long), glossy, glabrous, oblong-lance- 

 olate, acute at both ends, moderately petioled, sharply .setaceous-serrate with 

 short teeth; fruit biennial (?) ; acorn unknown, the immature cup with rather 

 acute appressed scales. 



90. Quercus ocoteaefolia Liebm. Overs. Dansk. Vid. Selsk. Forh. 1854: 176. 

 1854. 



Quercus laurina ocoteaefolia Wenzig, Jahrb. Bot. Gart. Berlin 3: 205. 1884. 



Oaxaca and Puebla ; also in MichoacS,n( ?) ; type locality, Talea and Laguna, 

 Oaxaca. 



Small deciduous tree with slender glabrescent twigs and small, glossy brown, 

 glabrescent buds; leaves moderate (3 cm. wide, 8 to 10 cm. long), glossy, 

 glabrous, or with axillary tufts beneath, lanceolate, acute at both ends or 

 somewhat rounded at base, shortly slender-petioled, entire or less commonly 

 with a few teeth ; acorn ovoid, 8 mm. in diameter, 10 mm. long, half included, 

 the rounded cup with blunt appressed scales. 



91. Quercus depressa Humb. & Bonpl. PI. Aequin. 2: 50. 1809. 

 Hidalgo ; type locality. El Jacal, Mor^n. 



Low evergreen shrub with slender stellate-scurfy twigs and small, dull 

 brown, glabrate buds; leaves small (1 to 2 cm. wide, 3 to 4 cm. long), rather 

 thick, slightly revolute, glabrate or the midrib puberulent above, lance-elliptic, 

 acute or acuminate, rounded at base, short-petioled. usually with a few coarse 

 teeth ; acorn ovoid, acute, 8 mm. in diameter, 12 mm. long, half included, the 

 rounded cup with blunt appressed scales. 



92. Quercus orizabae Liebm. Overs. Dansk. Vid. Selsk. Forh. 1854: 189. 1854. 

 Veracruz (?) ; type locality, Pico de Orizaba, at 2,G0O to 3,300 meters, with 



Q. floccosa. 



Twigs moderate, at first rusty-fleecy ; buds small, red-brown, somewhat hairy ; 

 leaves (deciduous?) rather large (3 to 7 cm. wide, 8 to 14 cm. long), glab- 

 rescent above, somewhat fleecy beneath, slightly revolute. elliptic-ovate, acute, 

 obliquely rounded at base, slender-petioled, entire or artistately about 3-toothed 

 at end ; fruit unknown. 



93. Quercus sideroxyla Humb. & Bonpl. PI. Aequin. 2: 39. 1809. 

 Guanajuato ; type locality, Santa Rosa. 



Large evergreen tree with slender lanose twigs and small brown glabrescent 

 buds; leaves small (2 cm. wide, 4 to 6 cm. long), the lower surface some- 

 times hairy-tufted, broadly oblong, subacute, cordate at base, short-petioled, 

 sharply and rather incisely toothed; acorn ovoid, 10 nmi. in diameter, 12 nun. 

 long, half included, the rounded cup with blunt api)ressed scales. 



94. Quercus chrysophylla Huml). & Bouiil. IM. Aequin. 2: 42. 1809. 

 Hidalgo; tyi)e locality, between Pachuca and Moran. 



Moderat(>-sized deciduous tree witli slender glaltresient twigs and small 

 reddish glabrous buds; leaves small (2 cm. wide, 4 to 6 cm. long), from scurfy 

 glabrescent, ol»lanceolate-oblong, with straight margin, subacute, rounded at 

 base, moderately petioled, setaceously several-toothed at end ; fruit unknown. 



