180 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



8. Quercus leiophylla A. DC. in DC. Prodr. 16 ': 71. 1864. 

 Veracruz ; type locality, San Bartolome. 



Deciduous tree with rather slender glabrous twigs and small rounded glabrous 

 buds; leaves rather small (2 to 3 cm. wide, 7 to 12 cm. long), glabrous, lance- 

 olate or oblanceolate, acute at both ends, short-petioled, subentire to typically 

 coarsely serrate above the middle; acorn ovoid, 20 mm. in diameter, 30 mm. 

 long, one-third included, the half-round cup with acute appressed scales. 



9. Quercus lancifolia Cham. & Schlecht. Linnaea 5: 78. 1830. 

 Veracruz ; type locality, Jalapa. 



Deciduous tree with slender glabrous twigs and small glabrous buds ; leaves 

 rather small (2 to 3 cm. wide, 8 to 12 cm. long), glabrous, venulose, flat, slightly 

 paler beneath, lanceolate, acute at both ends, subentire or coarsely, serrate 

 above; acorn elongate-ovoid, scarcely 15 mm. in diameter and 25 mm. long, the 

 saucer-shaped cup with blunt appressed scales. 



10. Quercus glabrescens Benth. PI. Hartw. 56, 348. 1840. 

 Hidalgo and Veracruz ; type from Real del Monte, Hidalgo. 



Deciduous tree with slender, stellate-villous or glabrate twigs and small 

 glabrous buds; leaves rather small (3 cm. wide, 6 to 10 cm. long), rugulose 

 and glabrate above, often stellate-pubescent beneath, elliptic-oblong or lanceolate, 

 acute, mostly rounded at base, short-petioled, coarsely serrate above with 

 revolute notches; acorn ovoid, 10 mm. in diameter, 15 mm. long, less than one- 

 third included, the shallow cup with acute, rather lax scales. 



An entire-leaved form is f. integrifoUa Liebiii. in DC. Prodr. 16 ^: 35. 1864. 



11. Quercus glaucoides Mart. & Gal. Bull. Acad. Brux. 10=: 209. 1843. 

 Quercus cordata Mart. & Gal. Bull. Acad. Brux. 10 ': 211. 1843. 

 Oaxaca ; type locality, in the Mixteca Alta. 



Medium-sized deciduous tree with s'lender, glabrescent, and often lightly 

 glaucous twigs, and small, at first hairy buds; leaves moderate (4 cm. wide, 

 8 cm. long), blue-green, glabrescent, slightly glaucous beneath, subelliptic, 

 obtuse, cordate, short-petioled, rather crenately repand above ; acorn unknown, 

 the small half-round cup with acute appressed scales. 



12. Quercus glaucophylla Seemen, Bot. Jahrb. Engler 29: 95. 1900. 

 Oaxaca ; type locality, San Felipe. 



Differing from the preceding in its obovate crenate leaves ; acorn ovoid, half- 

 included, 10 nun. in diameter and 15 mm. long. 



13. Quercus tuberculata Liebm. Overs. Dansk. Vid. Selsk. Forh. 1854: 181. 

 1854. 



Sinaloa (?) ; type locality somewhere in the western Sierra Madre. 



Deciduous glabrous tree with rather slender twigs and small buds ; leaves 

 moderate (3 to 5 cm. wide, 8 to 10 cm. long), elliptic-oblanceolate, rather ob- 

 tuse at both ends or the base very acute, short-petioled, crenate and often 

 crisped ; acorn round-ovoid, 12 mm. in diameter, 15 mm. long, scarcely one- 

 third included, the suburceolate cup with keeled or tuberculate, acute, ap- 

 pressed scales. 



14. Quercus idonea Goldman, Coutr. U. S. Nat. Herb. 16: 321. 1916. 

 Baja California ; type locality, Sierra de la Laguna. 



Small deciduous tree with rather slender twigs and small buds ; leaves mod- 

 erate or rather large (4 to 6 cm. wide, 10 to 12 cm. long), puberulent or gla- 

 brate, elliptic to ovate or oblong, rather acute at both ends or the base sub- 

 truncate, short-petioled, crisjied, somewhat coarsely subcrenate, especially above ; 

 acorn oblong-ovoid, 10 to 15 nmi. in diameter, 20 to 25 mm. long, the deeply 

 saucer-shaped cup with acute subappressed scales. " Encina roble." 



