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



15. Quercus purulhana Trel., Mem. Nat. Acad. Sci. 20: 63. pi. 64-. 

 1924. 



Large (?) tree. Twigs moderate or rather coarse (2 to 4 mm.), 

 fluted, reddish brown, from sparsely villous becoming glabrous, with 

 numerous pale prominent lenticels. Buds (mature?) about 2 mm. 

 long, ovoid, pilose or glabrescent, the stipules persistent for a while, 

 about 8 mm. long, narrowly ligulate, strigose dorsally. Leaves 

 deciduous, moderately thick, about 10 to 20 cm. long, 4 to 13 cm. 

 broad, obovate to oblong-elliptic, broadly rounded to acute at apex, 

 cordulate to deeply cordate at base, obscurely to profoundly undulate 

 with rounded or mucronate-tipped teeth, the cartilaginous margins 

 flat or minutely revolute, upper surface somewhat shining, from 

 minutely puberulent becoming glabrate except along the base of the 

 midrib, lower surface persistently short-fulvous-velvety and only the 

 veins glabrate, waxy where denuded; veins about 11 to 15 on each side, 

 obviously or obscurely branching and anastomosing near the margin, 

 in either case ultimately passing into the teeth, slightly impressed 

 above, rather prominent beneath; petioles 3 to 5 mm. long, reddish 

 brown, puberulent or glabrate. Staminate catkins about 4 cm. long, 

 the tomentose rachis loosely flowered, the anthers moderately ex- 

 serted. Pistillate catkins 2 to 4 cm. long, 2- to 4-flowered distally or 

 along the tomentose peduncle. Fruit annual, solitary, paired, or in 

 groups on a peduncle 1.5 to 2.5 cm. long; young cups (about half 

 grown) about 10 mm. in diameter, apparently becoming deeply cup- 

 shaped, the scales prominently thickened basally, the narrow apices 

 thin and loosely appressed, denselv short-tomentose all over. Acorns? 

 (See pis. 40 and 41.) 



Range: British Honduras and Baja Verapaz, Guatemala. 



Quercus purulhana was referred by Trelease to the series Macro- 

 phyllae Trel. Its reference to that group seems to have been prompted 

 by the nature of the type specimen, which is obviously a shade branch 

 with broadly obovate leaves, the largest in the size range of the species. 

 A duplicate of the same collection has smaller oblong leaves similar to 

 those of the other specimens referred to this species. Q. purulhana 

 differs from Q. peduncularis and from the unrelated but similar Q. 

 segoviensis in the dense short pubescenceof the under surface of its leaves. 



Specimens examined: 



BRITISH HONDURAS.— Great Southern Pine Ridge, September 1928, 

 Stocker 6 (F). 



GUATEMALA. — Dept. Baja Verapaz: Cuesta de Quililha, near Purulha, 

 April 21, 1905, Pittier 163 (NY, US [2] [type as sheet no. 472817]) ; Rabinal, Mav 9, 

 1906, Cook 15 (US); between Sabinal and Rabinal, May 31, 1904, Cook and 

 Doyle 285 (US) ; between Santa Rosa and Salama, June 5, 1904, Cook 266 (US) . 



Series Vicentenses Trel., Mem. Nat. Acad. Sci. 20: 58. 1924. 



Large trees with glabrate twigs; leaves evergreen, medium-sized, 

 oblong or lanceolate, subentire to coarsely toothed apically, glabrate 

 above, rather tomentulose beneath, the lower surface waxy-glaucous; 

 veins 10 to 15 on each side, impressed above, prominent beneath, 

 anastomosing; petioles short; fruit short-pedunculate. 



Range: El Salvador. 



Includes: Q. vicentensis Trel. (type). 



