STANDLEY TREES AND SHRUBS OF MEXICO. 193 



Guerrero ; type locality apparently Acapulco. 



Twigs slender, glabrous; buds small; leaves deciduous, moderate (2 to 4 

 cm. wide. 10 to 15 cm. long), glabrous, lanceolate, aristately long-acute, 

 typically rounded at base, sbort-petioled, entire; fruit annual (?) ; acorn sub- 

 globose, 12 mm. in diameter, half included, the subturbinate cup with appressed 

 scales. " Encina saucillo " (Durango). 



S3. Quercus ghiesbreghtii Mart. & Gal. Bull. Acad. Brux. 10 ^ 212. 1843. 



Veracruz ; type locality, on Mount Orizaba, at 3,300 meters. 



Moderate-sized evergreen tree with rather slender, at first dingy-tomentose 

 twigs and small, glabrate, glossy brown buds; leaves moderate (3 cm. wide, 

 8 to 10 cm. long), somewhat pubescent on the veins beneath, lanceolate, long- 

 acute, very round-based, moderately petioled, entire ; fruit annual ; acorn short- 

 ovoid, 10 mm. in diameter, 12 mm. long, the turbinately saucer-shaped cup with 

 blunt appressed scales. 



84. Quercus tlapuxahuensis A. DO. in DC. Prodr. 16 ': 29. 18G4. 



Quercus salicifolia tlapuxahuensis Wenzig, Jahrb. Bot. Gart. Berlin 3: 207. 

 1884. 



Michoacan ; type locality, Tlalpuxahua. 



Twigs moderate, glabrous; buds small, dull brown, loosely hairy above; 

 leaves (deciduous?) moderate (3 cm. wide, 7 to 10 cm. long), glabrous or the 

 midrib slightly puberulent above and the lower surface with axillary tufts, 

 lanceolate, aristately acute, rounded at base, slender-petioled, entire; fruit 

 annual ; acorn short-ovoid, 12 cm. in diameter, 1.5 mm. long, fully half included, 

 the rounded cup with obtuse, appressed, somewhat revolutely thickened scales. 



85. Quercus lanceolata Humb. & Bonpl. PI. Aequin. 2: 34. 1809. 

 Hidalgo ; type locality, between Mornn and Santa Rosa. 



Rather small (subevergreen?) tree with slender, transiently scurfy twigs and 

 small glabrescent brown buds; leaves rather small (3 cm. wide, 7 to 10 cm. 

 long), glabrous, or slightly scurfy above or fleecy in the axils beneath, lanceo- 

 late, acute at both ends or rounded at base, slender-petioled, entire or occasion- 

 ally with a few low aristate teeth ; acorn ovoid, 10 mm. in diameter, 12 mm. 

 long, scarcely half included, the rounded cup with glabrous blunt appressed 

 scales somewhat thickened toward the base. 



86. Quercus laurina Humb. & Bonpl. PI. Aequin. 2: 32. 1809. 

 Hidalgo ; type locality, Cerro de las Navajas, near Moriln. 



Very like the preceding, the deciduous leaves rather more broadly oblanceo- 

 late, the fruit apparently annual, and the cupule scales less commonly thick- 

 ened. 



87. Quercus major (A. DC.) Trel. 



Quercus nitens major A DC in DC. Prodr. 16^ 69. 1864. 



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



Veracruz ; type locality, Alpatlahua. 



Twigs rather slender, glabrate ; buds small, acute, glabrescent ; leaves de- 

 ciduous, moderate (2 to 4 cm. wide, 6 to 9 cm. long), glabrous, or puberulent 

 along the midrib above and with axillary tufts beneath, lanceolate to oblanceo- 

 late-obovate, acute at both ends or rounded at base, .slender-petioled, character- 

 istically serrately incised with aristate teeth ; acoi-n ovoid, 10 mm. in diameter, 

 15 mm. long, half included, the rounded cup with blunt appressed scales. 



88. Quercus barbinervis Benth. PI. Hartw. 56. 1840. 



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

 Hidalgo ; type locality. Real del Monte. 



Twigs rather slender, sparsely tomentose; buds small, glabrescent; leaves 

 deciduous, small (scarcely 3 cm. wide and 5 cm. long) or on shoots larger 



