DESCRIPTION OF SPECIES. 67 
entire; medial nerve slender, often curved; secondary nerves remote, very 
regularly and uniformly arched from their bases, terminating in or produced 
along the margins until they anastomose; tertiary nerves given off at right 
angles, forming a uniform network of which the areoles are polygonal, 
often quadrate. 
This is a well-marked leaf of what I had supposed to be a species of 
Salix. Without more material this can not be proven, but the form and 
nervation harmonize well with that of many species of the genus. Like 
the leaves of many of the willows, these are frequently unsymmetrical, one 
side being most developed and the midrib curved. The leaf is broadest 
next the base, and is thence narrowed to a long and acute point. 
Localities: Sayreville, Woodbridge. 
SaLix rnaQuaLis Newb. n. sp. 
Pl. XViI, figs. 1, 4, 6; PI. XVII, figs. 2-7. 
Leaves lanceolate, long-poimted, generally broadest near base, some- 
times in the middle, 8°" to 12™ in length by 4™ to 5°™ wide, long-petioled 
to sessile, margins entire; midrib slender, generally flexuous, always or 
mostly eccentric, dividing the blade longitudinally into two unequal parts; 
secondary nerves slender, often invisible, curved upward and apparently 
connecting near the margins. 
A large number of specimens of the leaves of this plant are contained 
in the collection. On Pl. XVII are given six figures illustrating the pre- 
dominant forms. The eccentric position of the midrib is perhaps their most 
striking character, and this has thrown a little doubt upon the propriety of 
their reference to Salix and has suggested Sapindus, but the flexuous form 
of the leaves is much more like the willows than like Sapindus, in which the 
leaves are pinnately arranged, with a certain rigidity of structure. Hence, 
until further light is thrown upon the plant, I have thought it better to 
leave it in the genus Salix. 
Locality: Woodbridge. 
