522 



FAGACEAE. 





18. Quercus Michauxii Nutt. Cow Oak. 



Basket Oak. (Fig. 1245.) 

 Quercus Michau.i-ii Nutt. Gen. 2: 215. 1818. 



A large tree, with gray flaky bark; maximum 

 height about 100 and trunk diameter 7. Leaves 

 obovate or broadly oblong, apex acute or acuminate, 

 base narrowed, rounded or subcordate, when mature 

 bright green, shining above, pale and gray tomeutu- 

 lose beneath, sharply toothed, 4 / -" / long, 2 l /z'~4% f 

 wide, the teeth acute or mucronulate; petioles slen- 

 der, Yz'-\y 2 f long; fruit maturing the first season, 

 short-peduncled or sessile; styles very short; cup 

 depressed-hemispheric, i'-i%' broad, its bracts 

 thick, ovate or lanceolate, appressed; acorns ovoid, 

 i / -i)4 / high, about 3 times as high as the cup. 



In moist soil, Delaware to Indiana, Arkansas, Flor- 

 ida and Texas. Wood hard, strong, tough, dense, dura- 

 ble; color light brown; weight 50 Ibs. per cubic foot. 

 April-May. Acorns ripe Sept.-Oct, sweet and edible. 



19. Quercus Prinus L. Rock Chestnut Oak. (Fig. 1246.) 



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



A large forest tree; maximum height about 100, 

 and trunk diameter 5; lower branches spreading; 

 bark brown, ridged, slightly flaky. Leaves 

 coarsely crenate, oblong, oblong-lanceolate or ob- 

 ovate, when mature dark green, glabrous and 

 feebly shining above, finely gray-tomentulose be- 

 neath, 5 / -S / long, iJ^ / -4 / wide; petioles slender, 

 y^'-i 1 /*' long; fruit maturing the first season; 

 peduncles equalling or shorter than the petioles; 

 styles very short; cup hemispheric, % f -\%' broad, 

 its bracts tomentose, triangular-ovate, acute or 

 cuspidate, appressed; acorn ovoid, I'-i^ 7 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, dura- 

 ble; color dark brown; weight per cubic foot 47 Ibs. 

 May-June. Acorns ripe Oct. -Nov. 



20. Quercus acuminata (Michx.) Sarg. 

 Chestnut or Yellow Oak. (Fig. 1247.) 



Quercus Prinus acuminata Michx. Hist. Chenes Am. 



no. 5. pi. 8. 1 801. 

 Quercus Muhlenbergii Engelm. Trans. St. Louis 



Acad. 3: 391. 1877. 

 Quercus acuminata Sarg. Card. & For. 8: 93. 1895. 



A tree with gray flaky bark, much resembling 

 the chestnut; maximum height about 160, and 

 trunk diameter 3^. Leaves oblong, lanceolate 

 or sometimes obovate, apex acuminate or acute, 

 base narrowed or rounded; coarsely toothed, when 

 mature dark green and shining above, pale, gray- 

 tomeutulose and prominently veined beneath, 

 4 / -6 / long, i / -2^ / wide; petioles slender, 1 2 ' -i' 

 long; fruit sessile or very short-peduncled, matur- 

 ing the first season; cup hemispheric, 5"-8" 

 broad, its bracts floccose, ovate, thick, acute or 

 cuspidate, appressed; acorn ovoid, 6 // -io // high, 

 about twice as high as the cup. 



In dry soil, preferring limestone ridges, Vermont and Ontario to Minnesota, south to Alabama 

 and Texas. Wood hard, strong, dense, close-grained, durable, dark brown; weight per cubic foot 

 54 Ibs. May-June. Acorns ripe Oct.-Nov., edible. 



