THE GENUS VIOLA IN MINNESOTA. 117 
Lake Superior, in June, 1893, by Mr. Sheldon, seem to 
belong here; as also two others from Lake Itasca, May, 1902, 
by Lyon and Rosendahl. Within the last two years the 
species has been discovered to be rather common in Ontario, 
and southern Michigan just west of Ontario. It is readily dis- 
tinguished from V. cuspidata by its smaller size, deltoid leaf- 
outline, and more pronounced hairiness. I do not know of 
its occurrence within or near the habitat of V. cuspidata, 
and here in Minnesota it is perhaps confined to the north- 
eastern section, whence come the few specimens seen. 
3. V. Noposa, Greene, Pitt. iv. 296 and v. 104. For our 
warrant in attributing this to Minnesota we are indebted 
again to the extensive and excellent field work of Mr. E. P. 
Sheldon, who obtained it near Brainerd, June, 1892, and 
somewhere in Ramsey Co., May, 1893. It is, therefore, 
probably no rarity in the middle-eastern section of the 
State. For an account of the associations in which it is to 
be sought, as well as for its obvious external marks, the 
student should consult the reference last cited. 
4. V. PRATINCOLA, Greene, Pitt. iv. 64. This might be 
called the Low-Prairie Violet, as to its habitat as compared 
with that of V. cuspidata, which itself might be designated 
as the Woodland-Border Violet. The present species was 
first recognized by myself as growing abundantly near 
Windom in 1898. Out of the various species covers in the 
Minn. Herb. I gather about eight sheets which I confidently 
refer here, and which indicate it to be common in meadows 
about Minneapolis, thence southward throughout the State, 
Westward to Pipestone near the western boundary. It is 
Teadily known from V. cuspidata by its lack of pubescence, 
and its rather light-blue corollas; and its leaves are smaller 
m proportion to the size of the plant, and more rounded. 
