38 NEW SYLYA 



sed ? Florida and Alabama in the hills, leaves 

 uncial, base and end quite entire, middle teeth 

 small but close subequal. 



Genus ULMUS. 



Without giving a complete monograph of all 

 our Elms, I will try to rectify and improve 

 this Genus by adding 5 to those already known 

 or admitted. There are several overlooked sp. 

 of it, since Thomas has quite lately described 

 the V. racemosa from New York : the others 

 known are V. americana, nemoralis, fulva 

 and alata, to which I shall add U. longifolia. 

 obovata, alba, dentata and dimidiata ; thus 

 we know already 10 N. Amer. Sp. and there 

 are more perhaps, those of Origon are not yet 

 described. 



567. ULMUS LONGIFOLIA Raf. shrubby, 

 branchlets slender smooth striated, leaves on 

 short petiols, smooth on both sides, thin, oblong 

 elongate, base subcordate hardly obliqual, end 

 acuminate, margin duplicate serrate Alaba- 

 ma and Tennessee, near to U. alata, but branch- 

 es not winged and leaves longer subcordate. A 

 shrub 8 to 10 feet high, leaves 3 to 4 inches 

 long about one wide. 



568. ULMUS OBOVATA Raf. Tree, branches 

 patent, branchlets terete smooth rugose, leaves 

 ample on short petiols obovate acuminate, base 

 obtuse obliqual. margin duplicate serrate, near- 

 ly smooth above, villose beneath in Kentucky 

 and Illinois, a tree 30 to 40 feet high, with 

 large leaves 4 to 6 inches long, 3 to 4 wide, 

 near to the two next which differ by oblong 

 leaves and white hanging branches, or ovate 

 rough leaves &c. 



569. ULMUS ALBA Raf. fl. lud. 387. U. Amer. 

 Var, pendula of Authors Tree with hanging 



