26 
Spring Flora of Oklahoma 
2. Quercus palustrus DuRoy. Swamp Oak or Pin Oak. A 
large tree, bark brown, rough when old. Leaves broadly oblong or 
obovate in outline, deeply pinnatifid, sometimes almost to midrib, 
bright green, glabrous and shining above, duller, glabrous or with 
tufts of hairs in the axils of the veins beneath, the lobes oblong, 
lanceolate or triangular-lanceolate, divergent, 1-4-toothed or entire, 
teeth and apices tipped with filiform bristles. Oup saucer-shaped, 
4"-6" broad, base flat, bracts triangular-ovate, acute or obtuse, ap- 
pressed. Acorn sub-globose or ovoid, 4"-7" high, often striate, 2-3 
times as long as the cup. 
In moist ground. May-June. 
3. Quercus Schneckii Britton. Schneck’s Oak. Large tree. 
Leaves mostly obovate in outline, bright green and shining above, 
paler and with tufts of wool in the axils beneath, 2'-6' long, truncate 
or broadly wedge-shaped at the base, deeply pinnatifid into 5-9 oblong 
or triangular lobes, which are entire or coarsely few-toothed, the 
lobes and teeth bristle-tipped, cup deeply saucer-shaped, 6"-8" 
broad, its scales obtusish or acute, appressed. Acorn ovoid, %'-T 
long, 2-3 times as high as the cup. 
Plains and prairies. April-May. 
4. Quercus coccinita Wang. Scarlet Oak. Leaves deeply pin¬ 
natifid, glabrous, bright green and shining above, paler and some¬ 
times pubescent in the axils of the veins beneath, 4'-8' long, rather 
thin, the lobes oblong or lanceolate, divergent or ascending, few¬ 
toothed, the teeth and apices bristle-tipped. Oup hemispheric or 
top-shaped, its bracts triangular-lanceolate, appressed or the upper 
slightly squarrose, mostly glabrous. Acorn ovoid or ovoid-globose, 
6"-10" high, about twice as long as the cup. 
In dry soil. May-June. 
5. Quercus velutina Lam. Black Oak. Leaves pinnatifid or 
lobed to beyond the middle, firm, brown-pubescent or sometimes stell¬ 
ate-pubescent when young; when mature, glabrous and dark dull 
green above, pale green and usually pubescent on the veins beneath, 
the broad oblong or triangular-lanceolate lobes and their teeth bristle- 
tipped. Cup hemispheric or top-shaped, broad, commonly nar¬ 
rowed into a short stalk, its bracts mostly pubescent, the upper 
somewhat squarrose. Acorn ovoid, V<z-V high, longer than the cup. 
In rocky or sandy soil. May-June. 
6. Quercus triloba Michx. Spanish or Water Oak. Leaves 
dark green and glabrous above, gray-tomentulose beneath, deeply 
pinnatifid into 3-7 linear or lanceolate, often falcate, acuminate, en¬ 
tire or dentate lobes. Teeth and apices bristle-tipped. Terminal 
lobes commonly elongated. Cup saucer-shaped with a turbinate base, 
5"-7" broad, its bracts ovate, obtuse, appressed. Acorn sub-globose 
or depressed, about twice as high as the cup. 
In dry soil. May to June. 
