THE CENTRAL AMERICAN SPECIES OF QUERCUS 19 



glaucous or gray the second year with evident white lenticels. Buds 

 10 (or becoming 15) mm. long, ovoid, glabrous; stipules caducous or 

 persistent for a time, about 8 mm. long, subulate to ligulate, appressed- 

 pubescent dorsally. Leaves deciduous (?), rather thick and hard, 

 large (10 to 20 or 28 cm. long, 4 to 9 or 10 cm. broad), elliptic or 

 oblong-elliptic to usually narrowly obovate, apically acute but the 

 tip finally minutely rounded, basally cuneate to rounded or truncate, 

 subentire to undulately wavy-margined or rarely toothed, margins 

 very minutely revolute, upper surface somewhat shining, glabrous 

 or puberulent along the principal veins, the midrib obviously to- 

 mentose, lower surface dull, fulvous- villous-tomentose or glabrate; 

 veins 18 to 20 on each side, obviously branched and anastomosing 

 near the margin, minutely raised above and very prominent (as is 

 also the reticulum) beneath; petioles 8 to 15 or even 25 mm. long, 

 2 to 3 mm. thick, densely fulvous-tomentose. Catkins? Fruit 

 annual, solitary, subsessile, very large at maturity; cups 4 to 8 cm. 

 broad, saucer-shaped or deeper, often contracted at base, the scales 

 very coarse, oblong or attenuate, much thickened and very broad at 

 base, the narrow apices loosely appressed or spreading, from densely 

 fulvous-tomentose nearly glabrate in age; acorns 4 to 7 cm. broad, 

 depressed-hemispheric, longitudinally striate, very thick-shelled, 

 about one-half included. (See pis. 4 and 5.) 



Range: Southern Sierra Madre Oriental region of Mexico and forest 

 of the British Honduras and Guatemala boundary region (above 

 800 m.); type from Volcan Orizaba, Veracruz, Mexico (Galeotti 123). 



Quercus insignis is reported to be' ' occasional" in the Honduras-Guate- 

 malan locality. This species is most closely related to Q. seibertii 

 from which it is distinguished by its numerous principal veins, its 

 undulate leaf margins, its noncordate leaves, and its subsessile fruit. 

 It is much more difficult to distinguish from the somewhat poly- 

 morphic Q. davidsoniae, to which it is actually not so closely related. 

 The attenuate apices and prominent teeth of Q. davidsoniae usually 

 may be trusted to distinguish it from Q. insignis. 



Specimens examined: 



BRITISH HONDURAS.— "Camp 36" British Honduras-Guatemala Boundary 

 Survey, June 19, 1934, Schipp 1247 (AA, F [2], MBG [2], Mi, NY) ; June 23, 1934, 

 Schipp 1248 (AA, F [type of Q. schippii], MBG, Mi [2], NY). 



2. Quercus seibertii sp. nov. 5 



Large tree to 25 m. Twigs very coarse (4 to 7 mm.), markedly 

 fluted, densely fulvous-tomentose, glabrate and gray the second year 

 with conspicuous white lenticels. Buds glabrate, for a time sur- 

 rounded by ligulate stipulelike scales; the stipules persistent for a 

 time, 10 to 12 mm. long, ligulate, dorsally appressed-pubescent. 

 Leaves deciduous, thin but firm, large (12 to 20 cm. long, 5 to 11 cm. 

 broad), elliptic or broader above the middle, apically acute or broadly 

 rounded, broadly and markedly cordate, entire, margins minutely 

 revolute, upper surface somewhat shining, glabrous or glabrate from 

 sparsely stellate-puberulent, midrib densely and conspicuously 

 fulvous-tomentose, lower surface dull, minutely stellate-puberulent, 



5 Quercus seibertii sp. nov.— Arbor grandis, ramuli 4-7 mm. crassi dense fulvo-tomentosi, folia decidua 

 12-20 cm. longa 5-11 cm. lata elliptica acuta vel rotundata cordata integra sparse puberulenta vel glabrata, 

 venis utrinque 13-15 ramosis et anastomosantibus subtus prominentibus, petioli 12-18 mm. longi dense 

 fulvo-tomentosi, amenta feminea 3-9 cm. longa 3-6 flora, fructus annuus brevipedunculatus, cupula 3-4 cm. 

 lata, squamae elongato-oblongae non appressae. 



