20. Quercus Bicolor Willd. Swamp White Oak

Fig. 1533

Q. Prinus platanoides Lam. Encycl. 1: 720. 1783.

Quercus bicolor Willd. Neue Schrift. Ges. Nat. Fr. Berlin, 3: 396. 1801.

Q. platanoides Sudw. Rep. Secy. Agric. 1892: 327. 1893.

A large tree, with flaky gray bark; maximum height about 1100 and trunk diameter 90. Leaves obovate, or oblong-obovate, coarsely toothed or sometimes lobed nearly to the middle, narrowed or rounded at the base, firm, when mature 4~7' long, 3 1/2'-4 1/2' wide, dark green, dull and glabrous above, densely white-tomentulose beneath; petioles stout, 3"_9" long; fruit maturing the first year; peduncles 2-5 times as long as the petioles; cup hemispheric, its bracts pubescent, lanceolate, appressed, the lower obtuse, the upper acute or acuminate; acorn oblong-ovoid, about I high; cup about 6" high; seed rather sweet.

In moist or swampy soil, Quebec to Minnesota, Georgia and Arkansas. Wood hard, strong, tough, close-grained, light brown; weight 48 lbs. per cubic foot. Swamp-oak. May-June. Acorns ripe Sept.-Oct.

20 Quercus Bicolor Willd Swamp White Oak 153320 Quercus Bicolor Willd Swamp White Oak 1534

21. Quercus Michauxii Nutt Cow Oak. Basket Oak

Fig. 1534

Quercus Michauxii Nutt. Gen. 2:215. 1818.

A large tree, with gray flaky bark; maximum height about 100° and trunk diameter 70. Leaves obovate or broadly oblong, apex acute or acuminate, base narrowed, rounded or subcordate, when mature bright green, shining above, pale and gray tomentu-lose beneath, sharply toothed, 4'-7' long, 2 1/2-4 1/2' wide, the teeth acute or mucronulate; petioles slender, -l long; fruit maturing the first season, short-peduncled or sessile; styles very short; cup depressed-hemispheric, 1'-1 1/2' broad, its bracts thick, ovate or lanceolate, appressed; acorns ovoid, 1'-1 1/2' high, about 3 times as high as the cup.

In moist soil, Delaware to Indiana, Missouri, Florida and Texas. Wood hard, strong, tough, dense, durable; color light brown; weight 50 lbs. per cubic foot. April-May. Acorns ripe Sept.-Oct., sweet and edible. Swamp chestnut-oak.

22. Quercus Prinus L. Rock Chestnut Oak

Fig. 1535

Quercus Prinus L. Sp. PI. 996. 1753.

A large forest tree; maximum height about 100 , and trunk diameter 50; lower branches spreading; bark brown, ridged, slightly flaky. Leaves coarsely crenate, oblong, oblong-lanceolate or obovate, when mature dark green, glabrous and feebly shining above, finely gray-tomentulose beneath, s'-8' long, 1 1/2-4' wide; petioles slender, 1/2'-1 1/2' long; fruit maturing the first season; peduncles equalling or shorter than the petioles; styles very short; cup hemispheric, 1/2'-1 1/2 broad, its bracts tomentose, triangular-ovate, acute or cuspidate, appressed; acorn ovoid, l'-l 1/2' high, 2-3 times as high as the cup; seed edible, but not very sweet.

In dry soil, Maine to southern Ontario, Alabama and Tennessee. Wood hard, strong, close-grained, durable; color dark brown; weight per cubic foot 47 lbs. May-June. Acorns ripe Oct.-Nov. Swamp or white chestnut-oak. Rock-, tan-bark- or mountain-oak.

22 Quercus Prinus L Rock Chestnut Oak 153522 Quercus Prinus L Rock Chestnut Oak 1536