LACKAWANNA AND WYOMING FLORA. 57 



83. CUPULIFER-ffi. 



BETULA, TOURN. 

 BIRCH. 



636. B. lenta, L. BLACK BIRCH. SWEET BIRCH. Frequent. 



637. B. lutea, MICHX. YELLOW BIRCH. Swamp at head of Little 

 Roaring Brook; near Gouldsboro. Dudley. Rather frequent in 

 Wyoming Valley. Thurston. 



638. B. populifolia, AIT. WHITE BIRCH. Dry soil, frequent. 



639. B. papyrifera, MARSHALL. PAPER or CANOE BIRCH. By the 

 mountain road near the summit of Bald Mt., in herb.; high hills above 

 Clark's Green, etc. Dudley. Near Chinchilla. Davis. Cliffs S. 

 of Luzerne. Thurston. 



640. B. nigra, L. RIVER BIRCH. Abundant along the Susquehanna 

 and the lower part of the Lackawanna. None seen above Peckville. 



ALNUS, TOURN. 

 ALDER. 



641. A. incana, WILLD. SPECKLED ALDER. Lower Lackawanna 

 Valley ; on the Moosic Mountains. Dudley. 



642. A. serrulata, WILLD. SMOOTH ALDER. Lower Lackawanna 

 Valley; Moosic Mountain slopes; lower slopes of Bald Mt.; Moun- 

 tain Inn road, in herb.; about Kingston. Dudley. 



643. A. viridis, DC. MOUNTAIN ALDER. The plateau east of Pe- 

 nobscot Knob. Dudley. 



CORYLUS, TOURN. 

 HAZEL-NUT. 



644. C. Americana, WALT. Lackawanna Valley and Keyser Valley. 

 Dudley. Common in thickets of Wyoming Valley. Thurston. 



645. C. rostrata, Ait. BEAKED HAZEL-NUT. Common about Arch- 

 bald. Davis. Ledges above Taylorville ; Duryea. Dudley. A 

 few shrubs near Shavertown are all that I have noticed in Wyoming 

 Valley. Thurston. 



OSTRYA, MICHELI. 

 IRON-WOOD. DEER WOOD. 



646. O. Virginica, WILLD. Frequent. 



