944 LEAFLETS OF PHILIPPINE BOTANY [Vor. III, Arr. 52 
Quercus zschokkei Elm. n. sp. 
A rather tall tree; stem 20. m. high, 6 dm. thick at 
least; its main branches arising from the middle, divaricately 
spreading, toward their ends crookedly and rigidly rebranched; 
bark brown, gray on the branches, smooth or only lenticelled; 
twigs not rigid, more or less horizontally spreading, green, 
glabrous, forming dense masses; wood hard, whitish or some- 
what brownish toward the center, without odor or taste. Leaves 
subchartaceous, alternatingly scattered along the twigs or 
branchlets, dark green above, lucid, of a grayish green be- 
neath, nearly flat or only the abruptly acute to acuminate apex 
recurved, caesius colored in the dry state, the entire margins 
slightly involute, oblong, the larger blades 15 cm. long by 6 cm. 
wide across the middle, frequently much smaller, base acute. 
to subcuneate or occasionally obtuse, glabrous; midrib promi- 
nently raised beneath, straw brown, with 6 to 9 very oblique 
lateral pairs, the reticulations very obscure, all glabrous; pet- 
iole terete, 1 cm. long, stout, also glabrous. Flowers not seen; 
infrutescent spikes few-clustered at the ends of the second year 
old branchlets, 15 cm. long, when young covered with a yel- 
lowish brown pulverulence, wearing glabrate, erect or ascending, 
grayish green, the larger spikes occasionally branched; fruits 
only a few coming to maturity, scattered, flatly obovoid, 17.5 
mm. long, 2.5 em. across the top; glans strongly and similar- 
ly compressed at both ends, at first finely brown canescent, ulti- 
mately glabrous, at least 1.5 cm. wide and one half as deep, bear- 
ing a button-shaped apex; eup with a stout irregular base, thick 
and ligneous, well overarching the glan and usually entirely 
covering it, rugose toward the base or on the under side, 
otherwise ringed, entirely without excrescences. 
Type specimen 10846, A. D. E. Elmer, Todaya (Mt. Apo), 
District of Davao, Mindanao, June, 1909. 
Of this rare species only one tree was seen on the upper 
wooded edge of a nearly precipitous slope along the Baru- 
ring river at 3000 feet where it joins the Sibulan river. The 
Bagobos call it '"Ulayan." I take pleasure in naming it after 
Mr. Theo. C. Zschokke, forester, Bureau of Forestry. 
Apparently it falls in the same section with Q. curranii 
Merr., but very distinct from that species. 
