STANDLEY TREES AND SHRUBS OF MEXICO. 191 



Rather small (deciduous?) tree with moderate, at first densely tomentose 

 twigs; leaves rather small (4 cm. wide, 5 to 6 cm. long), rugose, yellow-tomen- 

 tose beneath, rather obovate and acute, cordate, short-petioled, entire but 

 ciliately aristate above; acorn unknown, the rounded cup with blunt appressed 

 scales. 



71. Quercus dysophylla Benth. PI. Hartw. 55. 1840. 



San Luis Potosi, Vei-acruz, and Hidalgo ; type locality, mountains near 

 Huasca, Hidalgo. 



Twigs moderate, subglabrescent ; buds glossy red-brown, canescent, 3 ram. 

 in diameter, 5 mm. long; leaves deciduous, rather small (2 to 3 cm. wide. 5 to 

 8 cm. long), re volute, subglabrescent above, rusty-tomentose beneath, oblong, 

 ovate, or elliptic, subacute, cordate, moderately petioled, entire or less char- 

 acteristically coarsely mucronate-toothed ; acorn ovoid or elongate, 10 mm. in 

 diameter, 15 to 18 mm. long, the shallow turbinate cup with obtuse appressed 

 scales. " Manzanilla " (Hidalgo). 



To be compared with no. 40, Quercus diversifolia, and with the following. 



72. Quercus splendens Nee, Anal. Cienc. Nat. 3: 275. 1801. 

 Type locality, Tixtla, Guerrero. 



Small open-topped tree with moderate yellow-tomentose twigs; leaves (de- 

 ciduous?) rather small (3 to 4 cm. wide, 8 cm. long), puberulent above, yellow- 

 tomentose beneath, subelliptic, ranging to ovate or obovate, acute, rounded 

 at base or subcordate, subsessile, irregularly and unequally toothed, but not 

 aristate ; fruit unknown. 



Not known from recent collections. 



73. Quercus aristata Hook. & Arn. Bot. Beechey Voy. 444. 1841. 

 Tepic and Sinaloa; type locality, between San Bias and Tepic. 



Twigs rather slender, transiently fleecy ; buds glabrate, small ; leaves decid- 

 uous, moderate (3 to 4 cm. wide, 7 to 15 cm. long), glabrescent, somewhat 

 crisped and narrowly rovolute, elliptic-oblong, aristately obtuse or subacute, 

 rounded to cordate at base, moderately petioled, entire or undulate, sometimes 

 aristate from the veins ; fruit annual ; acorn round-ovoid, 10 mm. in diameter, 

 the deep rounded cup with blunt appressed scales. 



74. Quercus uruapanensis Trel. 



Quercus nitida Mart. & Gal. Bull. Acad. Brux. 10': 210. 1843. Not Q. nitida 

 Raf. 1838. 



Michoacan and Oaxaca (?) ; type locality, Uruapan, Michoac^n. 



Thick-trunked, moderately large, deciduous tree with rather slender, glab- 

 rous, dark red twigs and small, puberulent, glossy, deep brown buds ; leaves 

 rather large (4 to 7 cm. wide, 9 to 16 cm. long), glabrous, or with axillary tufts 

 beneath, subelliptic, acuminate, acute to truncate at base, moderately petioled, 

 entire or exceptionally somewhat aristate-toothed above ; acorn ovoid, 12 mm. 

 in diameter, 20 mm. long, one-third included, the rounded cup with blunt ap- 

 pressed scales. " Encina colorada." 



Yielding excellent timber. 



75. Quercus i-ysophylla Weatherby, Proc. Amer. Acad. 45: 423. 1910. 

 Nuevo Leon ; type locality, in the Sierra Madre above Monterrey. 



Rather small tree with stout glabrate twigs and glabrescent, glossy brown, 

 acute buds 3 mm. in diameter and 6 mm. long ; leaves supersistent, large (4 to 

 7 cm. wide, 14 to 20 cm. long), rugose and veiny, revolute, glabrous, lanceolate, 

 aristately long-acute, auriculate or deeply cordate at base, short-petioled, un- 

 dulate ; acorn unknown, the young cup with obtuse appressed golden scales. 



