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



13. Quercus segoviensis Liebm., Overs. Danske Vidensk. Selsk. 

 Forhandl. 1854: 186. 1854. 



Small tree. Twigs 1.5 to 5 mm. thick, fluted, from stellate-tomen- 

 tose becoming glabrate and reddish brown with numerous quite 

 prominent pale lenticels. Buds 4 or 5 mm. long, ovate to narrowly 

 conic, acute, reddish brown, glabrate or somewhat persistently 

 pubescent about the apex; the stipules about 4 or 5 mm. long, subulate, 

 dorsally strigose, persistent only about the terminal bud. Leaves 

 deciduous, drying yellowish brown, about 8 to 12 or 15 cm. long, 4 to 

 6 or even 9 cm. broad, broadly obovate to suboblanceolate, broadly 

 rounded at apex, usually markedly narrowed toward the base and 

 strongly cordate or rarely cuneate, erosely crenate and submucronate 

 or the base entire, margins revolute, upper surface dull, glabrate, lower 

 surface from stellate- velvety nearly glabrate or somewhat persistently 

 pubescent, the lamina low-bullate-granular ; veins 8 to 10 or 11 on each 

 side, branching but not evidently anastomosing, eventually passing 

 into the teeth, not forming evident mucrones but these aborted and 

 discolored as though frosted, principal veins raised above, quite 

 prominent (including the reticulum) beneath; petioles 3 to 7 mm. long, 

 2 to 5 mm. thick, reddish, glabrate. Catkins and fruit? (See pis. 



33 and 34.) 



Range: Guatemala, Honduras, and Nicaragua (1,000 to 2,500 m.); 

 the type from Segovia, Nicaragua {Oersted 3559). 



Although Q. segoviensis is the only member of the series Tnberculatae 

 in Central America, it is easily confused with certain species of other 

 series to which it is scarcely related. Its characteristic obovate, 

 cordate, erosely crenate leaves with raised veins and blades drying a 

 striking yellowish brown separate it from Q. peduncularis and Q. 

 pilicaulis, some forms of which it superficially resembles. 



Specimens examined: 



GUATEMALA. — Dept. Huehuetenango: Sierra de los Cuchumatanes, above 

 Chiantla, February 19, 1939, Standley 65653 (F, USX A). Dept. San Marcos: 

 Puente de Xahuatl-aa, near San Marcos, February 22. 1939, Standley 66205 (F). 

 Dept. Guatemala: without further data, 1938-1939. Aguilar 321 (F). Dept. 

 Zacapa: Sierra de las Minas, above Rio Hondo, October 11, 1939. Steyermark 

 29563 (F). 



HONDURAS. — Dept. Comayagua: vicinitv of Siguatepeque, February 14-27, 

 1928, Standley 55930 (AA, F, US). 



Series Pedunculares Trel., Mem. Nat. Acad. Sci. 20: 67. 1924. 



Medium-sized trees with tomentose, villous, or glabrate twigs; 

 leaves evergreen, medium-sized, oblong-elliptic to obovate, crenate to 

 coarsely serrate or entire, glabrate above, rather persistently loose- 

 tomentose or densely short-velvety or glabrate, short petiolate; fruit 

 medium-sized, usually long-pedunculate, the scales short-tomentose. 



Range: Sierra Madre Occidental of Mexico to Nicaragua. 



Includes: Q. peduncularis Nee (type) and Q. purulhana Trel. 



14. Quercus peduncularis Nee, Anal. Cienc. Nat. 3: 270. 1801. 



Quercus callosa Benth., PI. Hartw. 91. 1842. 

 Q. arachnoidea Trel., Mem. Nat. Acad. Sci. 20: 59. pi. 55. 1924. 

 Q. barbeyana Trel, Mem. Nat, Acad. Sci. 20: 67. pi. 76. 1924. 

 Q. barbanthera Trel., Mem. Nat. Acad. Sci. 20: 68. pi. 81. 1924. 

 Q. peduncularis subsp. callosa A. Camus, Monogr. Genre Quercus 



2: 599. pi. 196, f. 22-28. 1939. 

 Q. aguana Trel. in Yuncker, Field Mus. Bot. Ser. 9: 281. 1940. 



