THE CENTRAL AMERICAN SPECIES OF QUERCUS 71 



Griggs 615 (US). Dept. Baja Verapaz; Panzal, October 1912, Tiirckheim 3899 

 (US [2]). Dept. Guatemala: Finca La Aurora, 1938-1939, Aguilar 215 (F) ; 

 1940, Aguilar 497 (F). Dept. Sacatepequez: Acatepeque, without date, 

 Rodriguez 8636 (G, US [2]) ; Volcan Fuego, March 1892, Smith 2680 (G, MBG, 

 US [2]); Volcan Acatenango, August 1892, Shannon 8648 (US); near Las Lajas, 

 November 28, 1938, Standley 58065 (F, USNA). 



EL SALVADOR. — Dept. Ahuachapan: vicinity of Ahuachapan, January 

 9-27, 1922, Standley 20267 (NY, US); Cerro de Apaneca, near Finca Colima, 

 January 17-19, 1922, Standley 20154 (US); 1928, Calderon 2429 (F). Dept. 

 Cuscatlan: summit of Cerro del Guayabal, January 3-4, 1924, Calderon 1981 

 (US [tvpe of Q. salvadorensis], NY). Dept. San Vicente: Volcan San Vicente, 

 March 7-8, 1922, Standley 21599 (MBG, NY, US [2]). 



HONDURAS. — Prov. Comayagua: El Achote, above Siguatepeque, July 26, 

 1936, Yuncker, Dawson, and Youse 6116 (DeP, F, 111 [photo, in DeP and F] 

 [type of Q. trichodonta], MBG, Mi). 



38. Quercus monserratensis sp. nov. 15 



Large tree. Twigs 2 to 3 mm. thick, fluted, glabrous or sparsely 

 stellate-pubescent, dark brown with few small but rather conspicuous 

 pale lenticels. Buds about 3 mm. long and 2.5 mm. thick, ovoid, 

 obtuse, glabrous and light brown; the stipules caducous. Leaves de- 

 ciduous, thin but rather firm, 9 to 15 cm. long, 3 to 5 cm. broad, lanceo- 

 late, apex attenuately acute, base cuneate to usually rounded or 

 merely obtuse, acutely coarse-toothed throughout, the teeth long- 

 aristate-tipped, margins minutely revolute, both surfaces glabrous or 

 the lower puberulent along the midrib and tufted in the axils of the 

 veins, lustrous above, rather dull beneath; veins about 10 or 11 on each 

 side, intermediates lacking, branching and anastomosing near the 

 margin but clearly passing into the teeth, somewhat raised above, 

 more prominent beneath, the reticulum slightly raised on both sur- 

 faces ; petioles 20 to usually 30 or even 45 mm. long, 1 mm. thick, prom- 

 inently winged distally, glabrous. Staminate catkins? Pistillate 

 catkins 5 to 7 mm. long, 1- or 2-flowered distally. Fruit biennial, 

 solitary on a peduncle 6 to 14 mm. long and about 3 mm. thick; cups 

 20 to 22 mm. broad, 11 to 13 mm. high, cup-shaped, margins not in- 

 rolled, scales lance-ovate, the narrowed apex thin and very closely ap- 

 pressed, base keeled or corky-thickened especially toward the base of 

 the cup, gray-puberulent all over except the narrow glabrate and brown 

 margins; acorns depressed, subhemispheric, about 16 mm. broad and 

 13 mm. high, from minutely puberulent becoming glabrate and light 

 brown, the shell rather thick (about 1.5 mm.) but not exceedingly 

 hard, about one-half or more included. (See pi. 104.) 



Range: Chiapas, Mexico. 



Quercus monserratensis has been confused with Q. grandis, a Guate- 

 malan form of Q. skinneri, as a result of the chance resemblance of 

 mature fruit of Q. monserratensis to the immature fruit of Q. skinneri, 

 which was the basis of the name grandis. When the fruit size of Q. 

 skinneri approaches that of Q. monserratensis, as it does in the synony- 

 mous Q. salvadorensis, the cups are saucer-shaped and never propor- 

 tionally so deep as in Q. monserratensis. This new species further dif- 

 fers from Q. skinneri in its smaller buds and less thickened acorn shell; 

 its basally thickened cup scales indicate a close relationship, however. 



« Quercus monserratensis sp. nov. — Arbor grandis, ramuli 2-3 mm. crassi glabri vel sparse stellati; 

 gemmae 3 mm. longae 2.5 mm. crassae ovoideae obtusae glabrae, folia decidua 9-12 cm. longa 3-5 cm. lata 

 lanceolata attenuato-acuta basi cuneata vel rotundata ubique crasse aristato-dentata glabra vel costa subtus 

 et domatiis exceptis, venis utrinque 10-11, petioli 20-45 mm. longi surcum alati, fructus biennis solitarius 

 brevipedunculatus, cupula 20-22 mm. lata 11-13 mm. alta margine non involuta, squamae stricte appressae 

 basi incrassatae, glans 16 mm. lata 13 mm. alta subhemispherica circa 14 inclusa. 



