Corylus BETULACEAE Betula 



BETULACEAE (Birch Family) 



Corylus L. Hazel. 



C. americana Walt. Hazel Nut. 



Frequent in thickets and fencerows in the northern part; infre- 

 quent southward: near Greensboro (Ca), M. J. Fisher in 1938 (P); 

 several collections in Talbot County, Earle in 1937 and 1940 (P). 

 Fl., April, May; frt., July. 



C. cornuta Marsh. (C . rostrata Ait.) Beaked Hazel Nut. 



Rare in rocky woods along the Brandywine Creek near Wil- 

 mington: east bank of creek, opposite duPont's upper powder mill, 

 E. Tatnall in 1843 (D), William Tatnall in 1888 (D). Fl., April, 

 May; frt., July. 



Ostrya Scop. 



O. virginiana (Mill.) K. Koch. Hop Hornbeam. 



Rare; rocky woods of New Castle County: Mt. Cuba, Commons 

 in 1886 (A), and later collectors; east bank of Brandywine Creek, in 

 Brandywine Park, Wilmington, E. Tatnall in 1843 (D) ; west bank 

 of Brandywine Creek, at Wills Rock, Wilmington, R. R. Tatnall, 

 in 1934 and 1935 (T, P, G); in an open field. Holly Oak, J. B. 

 Brinton, in 1888 (P). Late April, early May. 



Carpinus L. 



C. caroliniana Walt. var. virginiana (Marsh.) Fernald. See 

 Rhodora 37, 425. 1935. Ironwood. Hornbeam. 

 Banks of streams; common in the Piedmont; less frequent 

 southward to the Virginia line. Late April, May. 



Betula L. Birch. 

 B. lenta L. Sweet Birch. 



Frequent in wooded stream valleys of the Piedmont area. 

 Fl., April, May. 



B. lutea Mx. f. Yellow Birch. 



One collection: north side of Smyrna River, near Smyrna (NC), 

 Commons & Tatnall, in 1894 (D). FL, May. 



B. nigra L. Black or River Birch. 



Common in low ground along streams. Piedmont, and Coastal 

 Plain as far south as the Virginia line. Fl., April, May. 



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