THE CENTRAL AMERICAN SPECIES OF QUERCUS 67 



This species is much like Q. benthami, Q. seemanni, and Q. eugeniae- 

 folia of farther southeast, but its biennial fruiting habit seems to 

 distinguish it amply from them. The questionably related Q. flagel- 

 lifera is distinguished below. 



Specimens examined: 



MEXICO.— Chiapas: Mount Paxtal [spelled "Pasitar"on labels], December 30, 

 1936, Matuda 1074 (Mi) ; Mount Ovando, April 1936, Matuda 296 (Mi) ; Las Casas, 

 February 1939, Martinez 363 (USNA); Motozintla, May 1939, Martinez 369 

 (USNA) ; August 1939, Martinez 380 (USNA) ; Cintalapa, February 1939, Martinez 

 371 and 377 (USNA). 



GUATEMALA. — Dept. Huehuetenango: San Juan Atitan, September 8, 

 1934, Skutch 1155 (F, 111). Dept. San Marcos: above Rio Tacana, near San 

 Antonio, February 22, 1939, Standley 66083 and 66100 (F); El Boqueron, summit 

 of road between San Antonio Sacatepequez and Palestina, January 30, 1941, 

 Standley 85284 (USNA) ; Puente de Nahuatl-aa, near San Marcos, February 22, 

 1939, Standley 66204 and 66208 (F, USNA); Standley 66217 (F) ; between San 

 Sebastian and top of Volcan Tajumulco, February 16, 1940, Steyermark 35780 and 

 35781 (F);nearTajumu]co,northwestslopesof Volcan Tajumulco, February 28, 1940, 

 Steyermark 36914 (F) ; Steyermark 36916 (F, USNA). Dept. Quezaltenango: 

 Quezaltenango, April 7, 1915, Trelease 54 (111 [5]) ; 1922, Hurler 2 (111 [2]) ; mountains 

 above Olintepeque, February 20, 1939, Standley 65959, 65964, 65966, 65974, and 

 65975 (F, USNA) ; above (north of) Olintepeque, January 29, 1941, Standley 85213, 

 85217, and 85225 (USNA); southeast of Palestina toward San Juan Ostuncalco, 

 January 21, 1941, Standley 84356 and 84358 (USNA) ; mountains southeast of 

 Palestina, February 22, 1939, Standley 66359 (F, USNA); mountains above 

 Ostuncalco, February 22, 1939, Standley 66380 and 66403 (F, USNA) ; between 

 Concepcion Chiquirichapa and San Martin Chile Verde, January 16, 1941, 

 Standley 83595 (USNA); Volcan Santa Maria, January 24, 1896, Nelson 3720 

 (G, US [2]); Volcan Santa Maria, above Palojunoj, March 6, 1939, Standley 

 67536, 67539, and 67543 (F) ; Standley 67538 (F, USNA); January 15, 1941, 

 Standley 83405, 83561, 83565, 83567, and 83583 (USNA); Volcan Santa Maria, 

 above Santa Maria de Jesus and Los Mojados, January 12, 1940, Steyermark 

 34036 (F, USNA). Dept. Totonicapan: Cumbre del Aire, between Huehuete- 

 nango and Sija, January 14, 1939, Standley 62640 and 62649 (F, USNA); January 

 11, 1941, Standley 83117 (USNA); between San Francisco El Alto and Momos- 

 tenango, January 19, 1941, Standley 84025 and 84098 (USNA); region of Chui- 

 quisis, above Totonicapan toward Desconsuelo, January 23, 1941, Standley 84396 

 (USNA). Dept. Baja Verapaz: north of Santa Rosa, March 30, 1939, Standley 

 69721 (F, USNA). Dept. Quiche: between Quiche and Totonicapan, May 16, 

 1906, Cook 28 (US); barranco south of Chichicastenango, January 11, 1939, 

 Standley 62394 (F, USNA). Dept. Chimaltenango: Chichavac, November- 

 December 1930, Skutch 14 (US [2] [types of Q. ambivenulosa]) ; Skutch 53 (111, US) ; 

 February 18, 1933, Skutch 252 (US); November 14, 1933, Skutch 691 (US); 

 Cumbre del Aire, January 1, 1937, Johnston 520 (F) ; Volcan Acatenango, February 

 6, 1907, Kellerman 6448 (F) ; Volcan Acatenango, above Las Calderas, January 

 3, 1939, Standley 61778 (F, USNA). Dept. Guatemala: Finca La Aurora, 

 1938-1939, Aguilar 291 (F) ; 1940, Aguilar 449 (F). Dept. Sacatepequez: Gua- 

 temala to Antigua (toward San Lucas), April 15, 1915, Trelease 52 (111 [2]); near 

 Antigua, February 4, 1907, Kellerman 6497 (US); Cuesta de las Canas, above 

 Antigua, December 6, 1938, Standley 58892 (F, USNA) ; Finca El Hato, northeast 

 of Antigua, December 28, 1938, Standley 61140 (F, USNA); hills of Finca Car- 

 mona, southeast of Antigua, January 27, 1939, Standley 63687 and 63787 (F, 

 USNA); Volcan de Agua, north of Santa Maria de Jesus, December 10, 1938, 

 Standley 59344 (F, USNA); Standley 59469 (F) ; Volcan Acatenango, March 1892, 

 Smith 2629 (G, NY, US [2] [illustrated as type of Q. donnell-smithii but mis- 

 numbered]) ; Februarv 20, 1905, Kellerman 4826, 4828, and 5151 (US) ; San Rafael, 

 February 1892, Smith 2627 (G, US [2]); above Las Calderas, December 15, 1938, 

 Standley 59984 (F, USNA). Dept. Jalapa: Volcan Jumay, north of Jalapa, 

 December 1, 1939, Steyermark 32408 (F) ; hills between Guisiltepeque and Potrero 

 Carrillo, December 11, 1939, Steyermark 33029 (F, USNA). 



36. Quercus flagellifera Trel., Mem. Nat. Acad. Sci. 20: 162. pi. 319. 

 1924. 



Large tree. Twigs 1 to scarcely 2 mm. thick, finely fluted, from 

 stellate-viilous becoming glabrate and reddish brown, the lenticels 



