No. 50.] 171 
Porutvs, (continued.) 
tremuloides, Michx. American Aspen. Dry woods. Appmil. 
tremula, L. P. grandidenta, Michx. Large Aspen. Woods. 
a Ait. P. canadensis, Michx. f. Cotton-wood. Western 
part of New-York. Michaux . 
nigra, Miche. P. hudsonica, Miche. sylv. P. betulifolia, Pursh. 
Black Poplar. Banks of the Hudson above Al- 
‘bany, Micha. fil. Borders of Oneida lake. 
Susp-Orper Myricez. Tue Ga.e TRIBE. 
Myrica, L. ; 
gale, L. Sweet Gale. Borders of lakes, generally in moun- 
tainous tracts. May. | 
cerifera, L. Bayberry, Wax Myrtle. Woods and thickets. May. 
Compronia, Banks. 
asplenifolia, Azt. Sweet Fern. Dry woods. April-May. 
Susp-OrpER PLATANES®. THe Piane TRIBE. 
Puatanus, L. Plane Tree. 
occidentalis, L. Button-wood, Sycamore. Banks of rivers. May. 
Sup-OrpDER STYRACIFLUEZ. 
LiQuIDAMBAR, L. Sweet Gum Tree. 
styraciflua, LZ. Bilested. Woods. April. 
- Orpen ULMACEZ. Tue Exo Trise. 
Uumus, L. Elm. 
americana, L. White Elm. Low woods. ° April-May. 
fulva, Michx. U. rubra, Miche. f. sylv. Slippery Elm, Red Elm. 
Rocky banks of rivers. April. 
racemosa, Thomas. Western counties, Mr. Thomas, Dr. Kneis- 
kern. 
Cextis, L. Hackberry. 
occidentalis, Z. Hoop Ash, Beaver-wood. Woods. May. 
