424 THE PLANT LIFE OF MARYLAND 



Corylus americana Walt. Hazel-nut. 



Throughout the state; being rare in the Coastal Zone, and frequent in 

 the Midland Zone in dry forests and open situations. 



Corylus rostrata Ait. Beaked Hazel-nut. 



Upper Midland District and Mountain Zone; in moist and dry forests on 



mountain slopes; infrequent. 

 Frederick County, Thurmont (1753). 



Betula nigra L. River Birch. 



Throughout the state; frequent in the Coastal Zone in flood plains and 

 stream swamps, common in the .Midland Zone in flood plains and along 

 streams. Also infrequent in dry situations. 



Betula lenta L. Sweet Birch. 



Apparently absent from the Eastern Shore, rare in the Western Shore 



District of the Coastal Zone, frequent in the Upper Midland District 



and Mountain Zone; preferring mountain slopes, in deep or rocky soil. 



Betula lutea Michx. Yellow Birch. 



Mountain Zone; in swamp and glade forests and along streams; 

 frequent. 



Alnus incana (L.) Willd. Hoary Alder. 



Mountain Zone; in swamps and bogs; infrequent. 

 Garrett County, near Oakland (199C). 



Alnus rugosa (Du Roi) K. Koch. Alder. 



Throughout the state; in swamps and flood plains and along streams in 

 open wet situations; common. 



Alnus maritima (Marsh.) Muhl. 



Coastal Zone; confined to the stream swamps of the Wicomico and 



Nanticoke rivers, where it is invariably associated with Chamaecy- 



paris; rare. 

 Wicomico County, Tonytank Creek (1191). 



FAGACEAE. 



Fagus americana Sweet. Beech. 



Throughout the state; in the Coastal Zone it is infrequent in moist 

 upland forests and swamps, and most common on the slopes leading 

 from streams and swamps to the upland; in the Midland Zone it is 

 frequent in moist forests and flood plains; in the Mountain Zone it is 

 infrequent in the forests of mountain slopes. 



Castanea dentata (Marsh.) Borkh. Chestnut. 



Rare on the Eastern Shore south of Queen Anne's County, being con- 

 fined to the gravel slopes, common in Cecil County and the Western 

 Shore District of the Coastal Zone, preferring gravel soil; common in 



