THE CENTRAL AMERICAN SPECIES OF QUERCUS 29 



kins 6 to 8 cm. long, floccose, rather densely flowered, the glabrous 

 anthers much exserted. Pistillate catkins 5 to 10 mm. long, 1- or 

 2-flowered. Fruit annual, solitary or paired on a peduncle 5 to 30 

 mm. long; cups about 15 mm. in diameter, hemispheric, the scales 

 prominently thickened basally, acute and appressed apically, canes- 

 cent; acorns 20 or 25 mm. long, about 12 mm. in diameter, about one- 

 half included. (See pis. 27 to 29.) 



Range: The Sierra Madre Oriental region of Mexico from Nuevo 

 Leon to southern Veracruz, reappearing in Guatemala; the types from 

 Jalapa, Veracruz, Mexico (Schiede 20 and 501 B). 



Quercus polymorpha is one of the most widely distributed of the 

 Latin American species. Its variations in leaf form in no manner 

 affect the constancy of its fundamental characters of fruit, leaf texture, 

 veining, etc. The species is not related to any other in our range 

 and could not readily be confused. 



It has not been possible to examine the type of Q. guatimalensis. 

 However, the very intensive collections of Standley and Steyermark 

 have turned up nothing that fits the description of Q,. guatimalensis 

 except undoubted specimens of Q. polymorpha, and these fit Lieb- 

 mann's, de Candolle's, and Trelease's descriptions exceedingly well 

 so far as vegetative characters are concerned. It is significant that 

 both the former descriptions called the leaves "mucronate." It is 

 doubtful that any species of Eryihrobalanus has teeth that could be 

 so described, but those of Q. polymorpha, as it occurs in Guatemala, 

 are definitely so. Trelease's illustration (pi. 300) of the type of 

 Q. guatimalensis rather clearly indicates the vegetative parts to be 

 conspecific with Q. polymorpha. The fruit, both as described and as 

 illustrated, is not of this species. Trelease figures it as detached, 

 and his doubt concerning maturation as well as his failure to mention 

 its attachment further indicates its detachment. Neither Liebmann 

 nor de Candolle mentioned this item. The fruit closely resembles 

 that of Q. sapotaefolia, for it is clearly of an Erythrobalanus species, 

 and no other species of either subgenus has fruit of that small size 

 and appearance. 



The fruit of Q. correpta, as illustrated by Trelease on the same plate, 

 is of the same type and likewise detached. Apparently von War- 

 scewicz mixed these fallen fruits through several of his sterile collec- 

 tions by accident. 



Specimens examined: 



MEXICO — Chiapas: Santa Rosa, near Escuintla, June 20, 1941, Matuda 4284 

 (USNA). 



GUATEMALA. — Dept. Huehuetenango: Uaxac Canal, August 6, 1896, 

 C. and E. Seler 8067 (G) ; west of Aguacatan toward Huehuetenango, December 

 27, 1940, Standley 81244 (USNA). Dept. Jalapa: along Rio Jalapa, between 

 Jalapa and San Pedro Pinula, December 9, 1939, Steyermark 82989 (F, USNA) ; 

 Montana Durazno, 2 miles east of San Pedro Pinula, December 10, 1939, Steyer- 

 mark 82966 (F, USNA); Steyermark 82973 (F[2], USNA). Dept. Chiquimula: 

 along Rio Taco, between Chiquimula and Montana Barriol, October 26, 1939, 

 Steyermark 30625 (F). 



Series Pacayanae ser. nov. 10 



Large trees, the twigs glabrous, buds round-ovoid, the stipules 

 caducous or persistent; leaves deciduous (?), thick, rather small, 



10 Series Pacayanae ser. nov.— Arbores grandes, ramuli mediocres glabri, gemmae rotundo-ovoideae, folia 

 decidua mediocria coriacea elliptica vel anguste obovata glabrata costa excepta, fructus anmius parvus 

 pedunculatus. 



323472°— 42 3 



