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



shorter, glabrous or puberulent. Staminate catkins 5 to 6 cm. long, 

 sparsely villous, loosely flowered, the anthers much exserted. Pistil- 

 late catkins about 5 mm. long, 1- or 2-fLowered. Fruit annual, solitary 

 on a peduncle 5 to 10 mm. long, rather large; cups 3 to 4 or even 

 6 cm. broad, shallowly cup-shaped or hemispheric (or discoid in some 

 Mexican forms), very thick, the scales broadly ovate with narrowed 

 apices, much thickened basally, appressed, closely tomentose; acorns 

 subglobose or ovate to oblong, 3 to 5 cm. in diameter, typically longi- 

 tudinally corrugated but often smooth, dark brown, from sparsely 

 villous glabrate, about one-half included. (See pis. 14 to 19.) 



Range: Chiapas and southeastern Mexico to Guatemala, El Sal- 

 vador, and Costa Rica (1,000 to 1,800 m.) ; type from Cerro del 

 Tamber, Guatemala {Skinner 5) . 



Quercus corrugata is the type species (by inference) of Trelease's 

 series Corrugatae to which it becomes necessary to add the Cyclob- 

 balanoideae. Quercus pilgeriana can scarcely be held distinct from 

 Q. corrugata since the only diagnostic character (length of petiole) is 

 strongly developed throughout Q. corrugata. The puberulence of the 

 petiole of Q. pilgeriana is not seen elsewhere, but the character can 

 bear but little weight in specific distinction unless correlated with 

 more reliable evidence. The bullate-granular condition of var. granu- 

 lifera appears on almost all old leaves even though slightly younger 

 leaves on the same branch are smooth. The elongate petioles of var. 

 ipalensis also occur throughout the species. The short petioles and 

 often discoid cups of Q. excelsa are not considered of specific signifi- 

 cance. Short petioles appear sporadically in the species, and discoid 

 cups seem to be the result of the gradual flattening of shallow cups 

 upon ripening. 



The reduction of Q. cyclobalanoides and Q. reevesii to synonymy 

 under Q. corrugata is necessitated for lack of any characters on which 

 they may be distinguished. The type collections of these two pro- 

 posed species definitely show this identity in both fruiting and vegeta- 

 tive characters. The fruits (identical in the two) have the acorns 

 nearly twice as long as broad and much exserted, a condition to be 

 expected with complete maturity, and the cups are identical with those 

 of Q. corrugata. The leaves of Q. reevesii cannot be distinguished from 

 those of Q. corrugata, whereas those of Q. cyclobalanoides are typical 

 of the expanded condition that results from dense shading and other- 

 wise do not differ. 



Specimens examined: 



MEXICO.— Chiapas: Finca Irlanda, August 1913, Pvrpus 6998 (F, US [type 

 of Q. cyclobalanoides], USXA [seed coll.]). 



GUATEMALA.— Without data, Skinner 3 (NY). Dept. Sax Marcos: above 

 Finca El Porvenir, south slope of Volcan Tajumulco, March 8, 1940, Steyermark 

 37243 (F, USXA); March 16, 1940, Steyermark 37990 (F). Dept. Quezalte- 

 xaxgo: vicinity of Santa Maria de Jesus on Volcan Santa Maria, January 8, 1940, 

 Steyermark 33765 (F) ; January 12, 1940, Steyermark 34230 (F, USXA); January 

 18, 1940, Steyermark 34368 and 34369 (F). Dept. Retalhulex: west of Volcan 

 Santa Maria, about 20 miles from Retalhulen, February 1918, Reeves without 

 number (111 [type of Q. reevesii]); Finca Helvetia, May 2, 1937, Muenscher 12438 

 (F). Dept. Suchitepequez: Finca Moca, April 3, 1931, Bequaert 40 (AA, F, G); 

 May 4, 1937, Muenscher 12453 (F). Dept. Alta Verapaz: near Finca Sepacuite, 

 April 10, 1902, Cook and Griggs 569 and 571 (US). Dept. Chiquimula: Volcan 

 de Ipala, around the lake, Januarv 1907, Pittier 1869 (US [tvpe of var. ipalensis]). 



BRITISH HOXDURAS.— Without further data, 1926, Stevenson 8939 (F 

 [fragment]) . 



