Co Ca Gr St Be Me Su Ro Hi Ch 



V^ar. intonsa Fern. 



Mostly in Coos County, occurs also in Carroll County ; of similar habitats. 



S. fragilis L. Crack-Willow. 



Often planted ; sometimes an escape : introduced from Europe. 



S. alba L. var. alba. W hite Willow. 



The common naturalized tree-willow of New England is S. aiha from Europe; the 

 least common of the varieties is the typical var. aIha, with a few widely separated 

 stations in southern New Hampshire : i". allm and its varieties may hybridize with 

 .9. iiii/ra. S. Iiicida. and S. (/racilis. 



Var. calva G. F. W. Mey. 



Of scattered distribution, locally common, cliiefly in very wet areas. 



Var. vitellina (L.) Stokes. 



The most abundant of tlie local varieties, occurring throughout at low elevations 

 in similar situations. 



16 



