122 PITTONIA. 
is as follows: In the summer of 1898, not long after having 
published V. subsagittata, I was in the field where J had been 
familiar with the plant almost forty years before. At various 
points in southern Wisconsin I found it in abundance; but 
the month was June, and the plant was in its summer stage, 
with large foliage, and plenty of pods from apetalous flow- 
ers—just the condition in which I wished to see and 
collect it. And wherever I found it plentiful, there I was 
always confronted with another form, growing with the 
type, exceedingly and strikingly unlike it in that its leaves 
were broad-cordate, without a hint of the sagittate, and 
its petioles very much elongated, while the peduncles of 
its fruits were out of all proportion short. This thing 
was by no means common. While associated immediately 
and invariably with V. swbsagittata, there would exist, say 
a hundred of that plant to one of the divergent cordate- 
leaved form. I made good specimens of it, and they have 
remained until now, nameless, within the V. subsagittata 
cover. In the Minnesota collection I am gratified to find 
flowering specimens of what I have no doubt is the same. 
There are two sheets of it, both gathered in June, 1892, by 
Mr. Sheldon, at different stations in the Mille Lacs region. 
The plant is doubtless an abrupt derivative of V. sub- 
sagittata, and possessed of less vitality than its parent species 
in so far as we can learn, inasmuch as it seems not to propa- 
gate itself; otherwise we should find it more copiously, and 
not in the condition of a solitary individual amid a patch 
of hundreds of the other. There were not the slightest hints 
discoverable by me, of any intergradation. 
12. V. SELKIRKI, Pursh, in Edinb. Phil. Journ. vi. 324 
Not mentioned in the Metasperme, though collected as early 
as 1891, by Dr. Sandberg, at Thompson, Carlton Co., but in 
fruit only, and mistaken for V. blanda, and so labeled. The 
