938 LEAFLETS OF PHILIPPINE BOTANY [Vor. III, Arr. 52 
or ascending; acorns mature, occasionally densely clustered, 
short ovoid, 1.25 inch across the base, 0.75 inch deep; 
calyx cup shallow especially the rim, hard, grayish, enclos- 
ing the fruit; nut ovoidly flattened, green except the brown 
apex, otherwise shining. 
Represented by numbers 10511, 11460 and 11856, Elmer, 
Todaya (Mt. Apo), Mindanao, May, August and September, 
1909. 
Quercus tasystachya Miq. 
Field-note:—A medium-sized tree, on steep wooded slopes 
along a dry ridge at 4000 feet of mount Burebid; stem straight, 
branched mostly near the top, 45 feet high, 2 feet thick; 
branchlets and twigs ascending, the latter yellowish brown; 
wood brownish white toward the center, hard, without 
odor and taste; bark also yellowish brown, more or less 
covered with  wart-like excrescences; branches forming a 
flattish crown; leaves mostly horizontally spreading, quite 
rigid, flat or shallowly curved on the upper dull ashy green 
surface, tips slightly recurved, conspicuously yellowish brown 
beneath especially along the nerves; inflorescence ascending, 
similarly colored; the whitish flowers strongly oak scented; acorns 
dark green and somewhat glaucous, flattish ovoid, tapering to a 
sharp point, less than 0.5 inch long; cup shallow, rather thin, 
furfuraceous. ‘‘Ulayan’’ is the native or Bagobo name. 
Represented by number 11841, Elmer, Todaya (Mt. Apo), 
Mindanao, September, 1909. 
Quercus celebica Miq. 
Field:note:—Medium-sized tree, along the upper edge of a 
wooded ravine of the Baracatan creek at 2250 feet; stem 
2.5 feet thick, 45 feet high,. branched from the middle; 
wood hard, whitish on the outside at least, odorless and 
tasteless; bark smoothish, grayish white mottled, the widely 
spreading branches covered with gray or whitish  lenticels; 
leaves: descending,- chartaceous, shining deep green above, 
much paler green beneath,,folded upon the upper side, tips 
recurved; infrutescence from, the second. year old leaf axils 
