408 Flora of the Malayan Peninsula. 
1. QuERcos, L. 
Trees or shrubs, deciduous or evergreen. Leaves toothed or 
lobed, rarely entire. Flowers moncecious: ¢ solitary or 1—3 to- 
gether, in pendulous catkins; 9 solitary in erect few-flowered spikes. 
Perianth: & cup-shaped, thin, with usually 6 sometimes 3—5 lobes 
supported by small bracteoles: 9 asin 3 , but smaller, free or adnate 
to the ovary, surrounded by an involucre of many imbricate or 
annular scales. Stamens usually 6, sometimes fewer; filaments 
slender ; anthers rather large. Ovary: in 3 flowers 0 or reduced toa 
villous pistillode; in @ flowers 3-celled, the cells 2-ovulate: 
styles usually 3, short, recurved; stigmas broad, lining the inner 
faces of the styles. Acorn ovoid globose or turbinate, seated on or 
partly enclosed in a cup-shaped or saucer-shaped cupule, the in- 
volucral scales hardened into teeth or tubercles or annular lamelle; 
pericarp crustaceous or coriaceous; surmounted by an umbo con- 
sisting of the persistent styles. Seed 1; testa membranous; coty- 
ledons fleshy, plano-convex.—Distriz. Temperate regions of the 
Northern Hemisphere, a few only extending down into the mountains 
of Malaya, about 200 species (Prantl). 
According to Prantlin Englerand Prantl’s ‘ Natiirlichen Pflanzenfamilien 
the genus is divisible into 3 Sections, all the species of the Malay Peninsula 
and Islands belonging to the Section CycLOBALANOPSIS in which the involucral 
bracts forming the cupule are united to form concentric lamelle with entire 
crenate or denticulate margins, and the leaves are dentate or serrate. 
Leaves with silvery scales on the lower surface, serra- 
tures near the apex obscure and shallow; acorn- 
cupules obconic-at base, then hemispheric, with 
8—10 minutely denticulate lamelle,2cm.deep .. 1. Q. argenitata. 
Leaves glabrous on the lower surface, serratures near 
the apex prominent. 
Leaves 10—18 em. long; cupule cylindric-hemis- 
pheric, 2—2 5 cm. in height and depth, the lamel- 
lz thin tomentose a Ae .. 2. Q. otdocarpa. 
Leaves 5—7 cm. long; cupuleslightly obconic 
below then cylindric, 1—5 cm. in height and 
diam., 2 of the lower belts much thickened, 
the rest thin Pee Ss .. 3. Q. turbinata, 
var. crassilamellata. | 
1. QuERcUS ARGENTATA, Korth. in Verh. Nat. Gesch. Bot. 
215, t. 47, fig 1—17 (1839—42). Atree; branchlets stout, rough, 
very prominently lenticellate. Leaves coriaceous; elliptic-oblong, 
oblong-lanceolate or oblanceolate, abruptly and somewhat obtusely 
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