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



Q. monserratensis is distinguished from Q. conspersa by its thinner 

 leaves and cup margins not inrolled. Vege tatively it ^resembles Q. 

 paxtalensis very closely, but its biennial fruit adequately distinguishes 

 it from that species. 



Specimens examined : 



MEXICO. — Chiapas: near Hac. Monserrate, April 1927, Purpus 10091 (AA 

 [type]); Zamapam, November 1926, Purpus 10824 (US). 



39. Quercus conspersa Benth., PI. Hartw. 92. 1842. 



Quercus acutifolia 8 conspersa A. DC. in DC. Prodr. 16 2 : 66. 



1864. 

 Q. acutifolia £ microcarpa A. DC. in DC. Prodr. 16 2 : 67. 1864. 

 Q. correpta Trel., Mem. Nat, Acad. Sci. 20: 153. pi. 300. 1924 



(pro parte — not the detached fruit which is Q. sapotaefolia) . 

 Q. grahami var. coyulana Trel., Mem. Nat. Acad. Sci. 20: 190. 



pi. 384. 1924. 

 Q. grahami var. nelsoni Trel., Mem. Nat. Acad. Sci. 20: 190. 



pi. 384. 1924. 

 Q. conspersa f. ovatifolia Trel., Mem. Nat. Acad. Sci. 20: 192. 



pi. 389. 1924. 

 Q. conspersa f. caudata Trel., Mem. Nat. Acad. Sci. 20: 192. 



1924. 



Large or small tree. Twigs 1.5 to 2.5 or rarely 4 mm. thick, fluted, 

 from minutely stellate-pubescent becoming glabrate and reddish 

 brown with few inconspicuous lenticels, becoming gray the second sea- 

 son. Buds 3 or 4 mm. long, narrowly ovoid, acute, somewhat angular, 

 glabrate or the apex f ulvous-tomentose ; the stipules promptly cadu- 

 cous. Leaves deciduous, rather thick and very hard, 10 to 15 or 

 sometimes only 6 or as much as 20 cm. long, 3 to 5 or sometimes only 

 2 or as much as 8 or 10 cm. broad, characteristically lanceolate and 

 long-acute, from oblong to ovate or obovate, apex attenuately acute 

 to acuminate or merely acute, base cuneate to unequally rounded or 

 rarely cordate, entire to coarsely toothed (these two forms often con- 

 stant in any given specimen), the teeth aristate-tipped or reduced to 

 aristae, antrorse or sometimes widely spreading, margins rather 

 coarsely cartilaginous but scarcely revolute, coarsely crisped or flat, 

 upper surface glabrate and somewhat shining, lower surface glabrate 

 or characteristically fulvous-puberulent (a resinous decomposition of 

 hairs or scales) and stellate-tufted in the axils of the veins ; veins 9 to 

 12 or 15 on each side, more or less obviously branching and anasto- 

 mosing but finally passing into the teeth where these are present, some- 

 what raised (as is also the reticulum) above, quite prominent beneath; 

 petioles 8 to 30 or rarely (on stump-sprouts) only 3 mm. long, 1 to 2 

 mm. thick, rather plainly or obscurely winged distally, puberulent or 

 glabrate with the lower leaf surface. Staminate catkins 6 to 8 cm. 

 long, the rachis densely tomentose or glabrate, rather loosely flowered, 

 the ellipsoid apiculate anthers moderately exserted. Pistillate cat- 

 kins 5 to 20 mm. long, 2- to 6-flowered. Fruit biennial, solitary or 

 paired on a peduncle 3 to 10 mm. long, cups 15 to 18 or rarely 22 

 mm. broad, 7 to 10 or rarely 13 mm. high, cup-shaped to goblet- 

 shaped, the base round or somewhat constricted, margins coarsely in- 

 rolled and sometimes inflated, rarely simple, scales ovate to triangular, 

 the apex rounded and often much narrowed, rather closely appressed, 



