100 
Salix cordata, Muhl. 
Wet places. Frequent. Quite variable. 
Salix livida, Wahi, var. occidentalis. (Gray’s Manual.) 
Quite common in rather dry places. A very curious abnormal form 
of this species was collected in Beverly, August, 1879, by Mr. 
Sears. The plant had for some reason put forth a new growth hav- 
ing catkins at the end of very short leaf-bearing branches. The 
bracts of the catkins were large and green, and the yellow stamens 
very distinct. ; 
Salix lucida, Muhl. (SHrntinG WILLOW.) 
By streams and ponds. Frequent. 
Salix nigra, Marsh, var. falcata. (Gray’s Manual.) 
Topsfield, Danvers, Chebacco, Andover, Essex, etc. Frequent. 
The largest of our native willows. 
Salix fragilis, L. 
‘*On the turnpike road to Salem” (Emerson, Trees and Shrubs of 
Mass.), Ipswich (Oakes). (Adv. from Eu.) 
Salix alba, L. 
The common large willow in Essex county. There are several va- 
rieties of this species. (Adv. from Eu.) 
Var. vitellina (Gray’s Manual). 
The most beautiful, although not so common as the ordinary form. 
Salix Babylonica, Tourn. (WEEPING WILLOW.) 
Common only under cultivation. 
Salix myrtilloides, L. 
Topsfield (Oakes), Essex, Boxford, Danvers (J. H. Sears). In 
cold bogs. Rather scarce. 
Populus tremuloides, Michz. (AMERICAN ASPEN.) 
Various parts of the county. Common. 
Populus grandidentata, Michz. 
Similar places to the last. Common. 
Populus balsamifera, L., var.candicans. (BALM OF GILEAD.) 
A native of northern New England. Much planted and spreading 
by root suckers. 
Populus dilatata, Ait. (LOMBARDY PoPLaR.) 
Once a common shade or ornamental tree, but fast disappearing. 
(Adv. from Eu.) 
Populus alba, L. 
Common in cultivation where it spreads much. (Adv. from Eu.) 

