Sl'EClES OE ELM. 539 



series. It is the most prolific, and the shoots and wood are 

 the most tenacious of all ; hence it was formerly, in the days 

 of archery, in much request for making bows. 



The genus Ulmus is one of those whose species, like those 

 of Salix, are so nearly related to each other, that they are 

 often confounded, and their differential characters not easily 

 discovered ; nevertheless, an attentive observer will perceive 

 something in their different habits, which, although not easily 

 expressed in words, leads him to remark other differences. 

 We must not, however, expect to find so many tangible and 

 decided marks in such genera, as in those tribes whose species 

 are farther remote from each other. The characters of the 

 British species I shall subjoin, from my own manuscript 

 notes. 



Samaris nudis. 



1. U. glabra, pentandra; floribus sessilibus 5-fidis obtusis, 

 samaris obovatis apice bifidis, foliis late oblongo-ovatis du- 

 plicato-serratis supra laevibus basi valde insequalibus, cor- 

 tice integra laevi. 



£. U. montana, pentandra ; floribus pedicellatis 5-fidis acutis, 

 samaris subrotundis emarginatis, foliis ovatis breve acumi- 

 natis duplicato-serratis scabris basi subaequalibus, cortice 

 rugosa. 



3. U. campestris, tetrandra ; floribus subsessilibus 4-fidis 

 obtusis, samaris oblongo-obovatis apice fissis, foliis acutis 

 duplicato-serratis rugosis basi subaequalibus, cortice rugosa. 



4. U. suberosa, pentandra ; floribus breve pedicellatis 5-fidis 

 obtusis, samaris subrotundis apice fissis, foliis late ellipticis 

 cuspidatis duplicato-serratis basi valde inasqualibus, cortice 

 suberosa rimosissima. 



5. U. major, tetrandra ; floribus subsessilibus 4-fidis obtusis, 

 samaris obovatis apice emarginatis, foliis amplis ellipticis 

 acutis duplicato-serratis scabris basi imequalibus, cortice 

 suberosa rimosissima. 



