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



cup-shaped or turbinate, the margins finely inrolled or coarsely in- 

 rolled and inflated, the scales oblong to ovate, truncate at apex, 

 rather loosely appressed, sparsely gray-appressed-pubescent; acorns 

 ovoid to subelliptic, 15 to 18 mm. long, 10 to 14 mm. broad, glabrous, 

 light brown, about one-half or more included. (See pis. 119 to 122.) 



Range: Mountains of western and central Guatemala and Chiapas. 



This polymorphic variety is fairly constant in its fruiting characters 

 and in the thickness of the impressed-veiny leaves and their more or 

 less granular-bullate lower surface. These characters seem to dis- 

 tinguish the variety amply from the species with which it is identical 

 in fruit characters and in the kind, if not the degree, of pubescence. 

 The various proposed species based on forms of this variety differ 

 only in leaf size, leaf shape, and persistence of pubescence. It would 

 serve no purpose to recognize them and the several additional ones 

 that consistency would demand. 



The form that has been called Q. chimaltenangana shows a degree of 

 relationship to Q. candicans Nee in leaf size and shape. Only the 

 larger leaves, short-appressed-stellate pubescence of the under leaf 

 surface, and the rather constantly aristate-toothed margins of the 

 latter species would distinguish it from the chimaltenangana form. 

 Q. brachystachys f . venulosa does suggest Q. brachystachys in its rather 

 persistently stellate twigs, but that character is common in the var. 

 pannosifolia. The thinnish leaves of f. venulosa with rather thin 

 curly stellate tomentum beneath definitely identify it with the var. 

 pannosifolia. Q. brachystachys f. caerulea is clearly identical with the 

 type of var. pannosifolia. 



Specimens examined: 



MEXICO. — Chiapas: Las Casas, San Cristobal, February 1939, Martinez 

 870 (TJSNA). 



GUATEMALA. — Dept. Quezaltenango: Quezaltenango, April 7, 1915, 

 Trelease 28 (111 [2] [type of Q. brachystachys f . venulosa]) ; Trelease 29 (111) ; April 6, 

 1915, Trelease 30 (111 [4] [tvpe of Q. brachystachys f. caerulea]) ; Volcan Santa Maria 

 above Palojunoj, March '6, 1939, Standley 67531 (F, USNA). Dept. Quiche: 

 Nebaj, November 15, 1934, Skutch 1653 (AA, F[2]). Dept. Chimaltenango: 

 Chichavac, November-December 1930, Skutch 44 (US [tvpe of Q. skutchii]) ; 

 Skutch 57 (US [type of Q. chichavacana}) ; Skutch 61 (111, US); Skutch 62 (111, US 

 [tvpe of Q. chimaltenangana]) ; Skutch 86 (111, US [tvpe of Q. aristigera]) ; March 11, 

 1933, Skutch 324 (US); March 12, 1933, Skutch 326 (US); November 11, 1933, 

 Skutch 681 (US [type of Q. chichavacana f . oblanceolata]) ; Skutch 682 and 683 (US) ; 

 November 14, 1933, Skutch 689 (US [tvpe of Q. chichavacana f. undulata]) ; Novem- 

 ber 19, 1933, Skutch 698 (111 [type ofQ. pannosifolia], US); November 27, 1933, 

 Skutch 712 (US [isotype of Q. chichavacana f. sublobata]) ; November 29, 1933, 

 Skutch 727 (US). Dept. Chimaltenango: Barranco de la Sierra, southeast of 

 Patzum, December 31, 1938, Standley 61532, 61543, and 61607 (F, USNA). 

 Dept. Guatemala: Finca La Aurora, 1940, Aguilar 44? (F) ; near San Juan 

 Sacatepequez, December 8, 1938, Standley 59247 (F, USNA). 



-Series Calophyllae TreL, Mem. Nat. Acad. Sci. 20: 202. 1924. 



Medium-sized or large trees; twigs rather coarse, glabrate or persist- 

 ently tomentose; buds ovoid to subfusiform, stipules caducous; leaves 

 large, characteristically obovate, usually aristate-toothed, densely 

 short-tomentose beneath; petioles moderately long; fruit biennial, 

 short-pedunculate, solitary or paired, cups hemispheric, acorns about 

 one-third included. 



Range: Guatemala and the proximal ends of both the eastern and 

 western Sierra Madre of Mexico. 



