406 



CoRYLUS, Tourn. Hazel-Nut. 



Americana, Walt, 

 rostrata, Ait. 



Carpinus, Linn. Hornbeam. 

 Americana, Micbx. 



OsTRYA, Micheli. Iron Wood. 



Virginica, Willd. , 



MYRICACE^. The Sweet Gale Family, 

 Myrica, Linn. Sweet Gale. 



Gale, Linn. Lake Superior, Dr. Houghton. 



CoMTONiA, Solander. Sweet Fern. 



asplenifolia, Ait. Dells of Wisconsin River. 



BETULACE^. The Birch Family. 



Betula, Tourn. Birch. 



papyracea, Ait. Canoe Birch. 



pumila, Linn. B. glandulosa, Mx. Low Birch. 



Alnus, Tourn. Alder. 



incana, V\'^illd. A. glanca, Mx. St. Croix River, Dr. Houghton, 

 serrulata, Willd. 



SALICACE^. The Willow Family. 



Salix, Tourn. Willow. 



Candida, Willd. 



tristis, Ait. 



humilis, Marshall. S, Muhlenbergiana, Barr. 



discolor, Muhl. 



eriocephala, Michx. S. prinoides, Ph. Mauvaise River, Dr. Houghton. 



sericea, Marshall. S. Gr.sea, Willd. 



rostrata, Ricbardson. 



lucida, Muhl. 



longifolia, Mubl. Upper Mississippi, Dr. Houghton. 



pedicellaris, Pursh. St. Croix, Dr. Parry. 



PoPULUS, Tourn. Poplar. 



tremuloides, Michx. Quaking Aspen. 



grandidentata, Micbx. 



candicans, Ait. Balm of Gilead. 



• PLATAN ACE^. The Plane-Tree Family. 



Platancs, Linn. Sycamore, Buttonwood. ^ 



occidentalis, Linn. 



