624 



FAGACEAE. 



VOL. I. 



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 7. 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'-/ long, 2^-4*' 

 wide, the teeth acute or mucronulate ; petioles slen- 

 der, \'-\\' long; fruit maturing the first season, 

 short-peduncled or sessile ; styles very short ; cup 

 depressed-hemispheric, I'-ii' broad, its bracts thick, 

 ovate or lanceolate, appressed; acorns ovoid, \'-\\' 

 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 Ibs. 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 5 ; 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, 5'-8' long, 

 ii'-4' wide; petioles slender, i'-ii' long; fruit ma- 

 turing the first season ; peduncles equalling or 

 shorter than the petioles ; styles very short ; cup 

 hemispheric, \'-l\' broad, its bracts tomentose, 

 triangular-ovate, acute or cuspidate, appressed; 

 acorn ovoid, I'-ii 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 Ibs. May- 

 June. Acorns ripe Oct.-Nov. Swamp or white chest- 

 nut-oak. Rock-, tan-bark- or mountain-oak. 



23. Quercus Muhlenbergii Engelm. Chest- 

 nut or Yellow Oak. Fig. 1536. 



Quercus Prinus acuminata Michx. Hist. Chen. Am. no. 

 5. pi. 8. 1801. 



Quercus Muhlenbergii Engelm. Trans. St. Louis Acad. 3 : 

 39i. 1877. 



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



A tree with close or flaky bark, much resembling 

 the chestnut; maximum height about 160, and 

 trunk diameter 3}. Leaves oblong, lanceolate or 

 obovate, apex acuminate or acute, base narrowed or 

 rounded, coarsely toothed, when mature dark green 

 and shining above, pale gray-tomentulose and promi- 

 nently veined beneath, 4'-6' long, i'-2$' wide; 

 petioles slender, i'-i' long; fruit sessile or very 

 short-peduncled, maturing the first season ; cup hemi- 

 spheric, 5"-8" broad, its bracts floccose, ovate, 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, Nebraska, 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. Pin-, shrub-, scrub-, chinkapin- or yellow 

 chestnut-oak. 



