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 ioo° 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\'-a,\' 

 wide, the teeth acute or mucronulate ; petioles sleii- 

 der, i'-il' long; fruit maturing the first season, 

 short-peduncled or sessile; styles very short; cup 

 depressed-hemispheric, i'-il' broad, its bracts thick, 

 ovate or lanceolate, appressed; acorns ovoid, i'-ij' 

 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 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, s'-8' long, 

 \Y-A' wide; petioles slender, J'-iJ' long; fruit ma- 

 turing the first season ; peduncles equalling or 

 shorter than the petioles ; styles very short ; cup 

 hemispheric, J'-il' 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 lbs. 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 : 

 391. 1877. 



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



A tree with close or flaky bark, much resembling 

 the chestnut ; maximum height about 160°, and 

 trunk diameter 34°. 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'-2l' wide; 

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

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

 spheric, S"-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 lbs. May-June. Acorns ripe Oct.-Nov., edible. Pin-, shrub-, scrub-, chinkapin- or yellow 

 chestnut-oak. 



