OF NORTH A1UKR1CA. 39 



branches, bark whitish, leaves oblong, base 

 acute obliqual, duplicate dentate, roughish and 

 lucid above, villose beneath in Louisiana and 

 other States, 50 to 60 feet high, long flexible 

 branches. As this with the last and next are 

 often blended under the vulgar name of White 

 Elm, I must add what I consider as the real 

 U. Americana. 



570. ULMUS AMEHICANA L. Authors: (sessi- 

 lis Raf. better name.) Tree, branches divar- 

 gent, branchlets terete smooth rugose, leaves 

 subsessile ovate acuminate, duplicate serrate, 

 base very obliqual subcordate, above rough, be- 

 neath soft hardly pubescent chiefly in the Al- 

 leghany mts. large tree 60 to 80 feet high, 

 leaves 3 to 4 inches long 2 or 3 broad. Thus 

 quite distinct from both the preceding. 



571. ULMUS DENTATA Raf. Tree, branchlets 

 terete smooth, leaves ample and thin, on long 

 petiols, obovate, base acute entire, not obli- 

 qual, large sharp teeth above, end subacumi- 

 nate, smooth on both sides, fruits fasciculate pe- 

 duncled oblong bifid fimbriate on the sides a 

 fine new Elm, sent me from Alabama as U. 



fulva, but totaly unlike, much nearer to U. ne- 

 moralis ? which differs by oblong leaves and 

 sessile flowers. Leaves very large 6 to 7 in- 

 ches long, 3 to 4 broad, petiols over one inch 

 longer than in any other sp. the large subequal 

 teeth are only in the upper half, fascicles of 

 flowers multiflore, pedicels filiform, calix cam- 

 panulate,stamens exserted, pistil cuneate oblong 

 bifid by the 2 styles. It is called the yellow 

 Elm. 



572. ULMUS PIMIDIATA Raf. shrubby, branch- 

 lets smooth angular, leaves on very short peti- 

 ols, quite smooth biforme, some smaller ovate 



