28 MISC. PUBLICATION 4 7 7, U. S. DEPT. OF AGRICULTURE 



Rica (represented by Standley and Valerio 50651 , Smith 2756 and 2879) 

 which approaches Q. pacayana in thickness of lamina, rounded leaf 

 bases, impressed veins, etc. It is very likely that mature fruiting 

 material of all the forms involved will prove this Costa Rican form to 

 be a distinct species, but there is at present no justification for the 

 segregation. 



Specimens examined: 



GUATEMALA. — Dept. Guatemala: Volcan de Pacaya, above Las Calderas, 

 November 30, 1938, Standley 58466 (F [2] [type as sheet no. 982534], USNA). 

 Dept. Jalapa: Volcan Jumay, north of Jalapa, December 1, 1939, Steyermark 

 82879 (F, USNA). 



HONDURAS. — Dept. Tegucigalpa: La Aurora trail, Rosario, San Juancito, 

 April 2, 1932, Edwards 18 (AA, F). 



COSTA RICA.— Prov. Alajuela: Palmira, June 11, 1941, A. Smith 2756 

 (USNA); July 1, 1941, A. Smith 2879 (USNA). Prov. Heredia: Cerros de 

 Zurqui, northeast of San Isidro, March 3, 1926, Standley and Valerio 50546 and 

 50651 (F, US) ; Cerro de las Caricias, north of San Isidro, March 11, 1926, Standley 

 and Valerio 52178 and 52194 (F, US); Vara Blanca de Sarapiqui, north slope of 

 Central Cordillera, between Poas and Barba Volcanoes, February 1938, Skutch3584 

 (US). Prov. San Jose: near Finca La Cima, above Los Lotes, north of El Copey, 

 December 21-22, 1925, Standley 42629 (F,US). Prov. Cartago: Cerro de la 

 Carpintera, February 1924, Standley 84895 (US); "Highest Carpintera," April 3, 

 1928, Stork 1365 (F). 



Series Polymorphae Trel., Mem. Nat. Acad. Sci. 20: 49. 1924. 



Small or large trees with glabrate twigs ; buds ovoid ; leaves decidu- 

 ous, medium-sized, ovate-lanceolate or oblong, entire or few-toothed, 

 evidently petiolate, glabrate above, waxy-glaucous beneath; fruit 

 medium-sized, the scales markedly thickened basally. 



Range: Sierra Madre Oriental of Mexico to Guatemala. 



Includes: Q. polymorpha Schlecht. and Cham, (type) and one doubt- 

 ful species in Mexico. 



10. Quercus polymorpha Schlecht. and Cham., Linnaea 5: 78. 1830. 



Quercus petiolaris Benth., PI. Hartw. 55, 348. 1840. 



Q. varians Mart, and Gal., Bui. Acad. Brux. 10: 214. 1843. 



Q, guatimalensis A. DC. in DC. Prodr. 16 2 : 78. 1864. 



Q. turbinata Liebm., Overs. Danske Vidensk. Selsk. Forhandl. 



1854: 186. 1854. Not Q. turbinata Blume, Bijdr. Fl. Ned. Ind. 



523. 1825. 



Medium-sized tree. Twigs 2 to 3 mm. thick, obscurely fluted, 

 reddish brown, from loosely buff tomentose soon glabrate, with nu- 

 merous pale lenticels. Buds about 3 to 5 mm. long, ovoid or lance- 

 ovoid, acute, reddish brown, glabrate or rather persistently hairy, 

 the subulate pubescent stipules persistent only about the terminal bud. 

 Leaves deciduous, rather thick, about 5 to usually 10 or even 15 cm. 

 long, 3 to 4 or 6 (8) cm. broad, oblong-elliptic or ovate to lanceolate or 

 obovate, broadly or narrowly rounded and often emarginate at apex, 

 rarely acuminate but the tip finally rounded, cordate or rounded at 

 base, entire or crenately coarsely mucronate-toothed above the middle, 

 margins minutely cartilaginous-revolute, upper surface dull or shiny, 

 glabrate, lower surface opaque or somewhat waxy -glaucous, rather 

 persistently buff-floccose or glabrate; veins about 10 to 12 or 14 on 

 each side, much branched and anastomosing near the margin, impressed 

 above, very prominent (including the reticulum) beneath ; petioles 6 to 

 usually 15 to 25 mm. long, glabrate, reddish brown. Staminate cat- 



