FAGACEAE (BEECH FAMILY) 



341 





67C. Q. Muhlenbergii. 



Q. prinoides. 



3 cm. long. Borders of streams and swamps, Del. 

 to Mo., and southvv. FIG. 675. 



7. Q. Muhlenbergii Engelm. (YELLOW O., CHEST- 

 NUT 0.) Leaves (1-2 dm. long) slender-petioled, 

 often oblong or even lanceolate, usually acute or 

 pointed, mostly obtuse or rounded at base, almost 

 equally and rather sharply toothed,' cup subsessile, 

 shallow, thin, of small appressed scales ; acorn glo- 

 bose or obovoid, 1.5-2 cm. long. (Q. acuminata 

 Houba.) Dry limestone hillsides 

 and rich bottoms, Vt. to Del., along 

 the mts. to n. Ala., w. to Minn., 

 e. Neb., and Tex. A tall tree, 

 with thin eventually . flaky bark. 

 FIG. 670. 



^W "vNk^ 8> Q- Prinoides Willd. Like the 



fr ^^f^ last ' but f low stature (usually 

 /I \ /; |^ 1-3 in. high), with smaller more 



undulate leaves on shorter petioles 

 (rarely 1 cm. long), and deeper 

 cups with more tumid scales. Dry 

 soil, N. H. to Minn., and southw. 

 Branchlets glabrous ; leaves cov- 

 ered beneath with a close white tomentum. FIG. 677. Var. 

 RUFESCENS Rehder differs in having the young branchlets 

 pubescent and some tawny wool mixed with the white to- 

 mentum on the under surface of the leaves. Damp woods 

 and pine-barrens, e. Mass, to N. C. 



9. Q. Prinus L. (CHESTNUT 0.) Leaves thick, obovate or oblong to lanceo- 

 late, sometimes acuminate, with an obtuse or acute base, undulately crenate- 



toothed, pale and minutely downy beneath, the 

 primary ribs 10-16 pairs, straight, prominent 

 beneath ; fruiting peduncles shorter than the 

 petioles, often very short ; cup thick, mostly tu- 

 berculate with hard and stout scales. Rocky 

 banks arid hillsides, s. Me. to Ont., and southw. 



A large tree, with thick and deeply furrowed 

 bark. FIG. 678. 



10. Q. virginiana Mill. (LIVE O.) Leaves 

 small, oblong or elliptical, hoary beneath (as well 

 as on the branchlets) ; peduncle 



usually conspicuous, 1-3-fruited ; 

 cup top-shaped ; acorn subcylin- 

 dric ; cotyledons completely united 

 into one mass. (Q. virens Ait.) 



Along the coast from Va. to Fla. 

 and Tex. Becoming a large tree, 

 or in sterile soil dwarf. FIG. 679. 



11. Q. rubra L. (REDO.) Cup 

 saucer-shaped or flatfish, with a 

 narrow raised border, 1.8-2.5 cm. 

 broad, of rather fine closely ap- 

 pressed scales, sessile or on a very 



abrupt narrow stalk or neck, very much shorter 

 than the narrow-ovoid or ellipsoid acorn, which 

 is 2-3 cm. long; leaves rather thin, turning dark red after frost, moderately 

 (rarely very deeply) piunatifid, the lobes acuminate from a broad base, with a 

 few coarse teeth ; bark of trunk dark gray, smoothish. Common both in rich 

 and poor soil. Timber coarse and poor. FIG. 680. Along our northern 

 borders passing to Var. AMBfcuA (Michx. f.) Fernald. (GRAY O.) Cups 



679. Q. 

 virginiana. 



678. Q. Prinus. 





