NOTES ON SALIX LONGIPES. 51 
individuality, under such circumstances, is perhaps the 
strongest proof of their specific distinctness. 
It is desirable that the range of S. longipes be better 
known. Our botanists of the South should, everywhere, 
look for it and report. With a view to further observa- 
tions, the writer would request to have specimens sent him. 
A few words in reference to the plates. The writer feels 
the inadequacy of such representations as can be given. A 
moment’s look at an actual specimen is incomparably more 
instructive than the most painstaking attempt at reproduc- 
tion. It is hardly possible to select a single leaf as typical 
even of a single plant, much less of a locality. In respect 
to the forms of leaves exhibited on the plates, let the reader 
therefore, not imagine that there are no other forms in the 
respective localities. The variations probably occur every- 
where. 
In conclusion, I desire to express my special obligations 
to Dr. Trelease for correcting copy and proof of this paper 
as well as for other kindly assistance. 
EXPLANATION OF PLATES ILLUSTRATING SALIX. 
The figures are from material selected by the author, 
and drawn, under his direction, by Miss Grace E. Johnson. 
Throughout, habit sketches, leaves, stipules and catkins 
are of natural size, capsules are X 2, and flowers are X 4. 
Salix nigra.— Plate 5,f.2; plate 6, f.6,f. 7c (both from St. Louis), 
f. 12 (Texas); plate 7, f la. 
Salix longipes.— Plate 5, f. 1 (St. Marks, Florida, Rugel), f. 3 and 4 
(Missouri); plate 6, f. 1 (Florida), f. 2 (North Carolina), f. 3 (Nash- 
ville, Tennessee), f. 4 (Texas), f. 5 (Missouri), f. 7a (palmate form of 
leaf), f. 8 (Carter County, Missouri), f. 9 (Bonne Terre, Missouri), f. 10 
(Watson, Missouri); plate 7, f. 1, 2; 3 (Louisville, Kentucky), f. 4 
(Washington, D.C.), f. 5 (St. Louis), f. 6 (Pilot Knob, Missouri), f. 7 
(New Mexico). 
Salix longipes, venulosa.— Plate 6, f. 11 (Texas). 
Salix amygdaloides.— Plate 6, f. 7b (palmate form of leaf). 
9 
