118 PITTONIA. 
Though its petals are pale, and though the plant inhabits 
rather low meadows, it is not at all allied to the eastem : 
V. cucullata or any of the recently proposed segregates by 
that species, in which the apetalous flowers are borne erect 
and above ground. 
5. V. suBRoTUNDA, Greene, n. sp. Low large-leaved 
short-petioled plant about 4 inches high at petaliferous flow- 
ering and wholly glabrous, not at all succulent, the foliage — 
ather thin, deep-green, the blades suborbicular, cordate art 
base, subserrate-crenate, obtuse, about 14 inches in breadth 
and 2 in length, the slender petioles of less than twice the 
length of the blades: petaliferous peduncles quite surpass- 
ing the foliage, also slender, bibracteolate not far below the 
flower and the bractlets not opposite, rather remote: sepals — 
short, obtuse, ovate-lanceolate, nerveless, strongly auricled; a 
petals blue, not large (the corolla little more than } inch 
broad), oblong, obtuse or emarginate, nearly equal in siz — 
and length: peduncles of apetalous flowers equally slender, 
aerial but short, ascending, their capsules short, ovoid. 
Although next of kin to V. pratincola, this plant is at 
essential disagreement with that species by its large short- 
stalked and broadly rounded leaves, and especially by its 
aerial and upright apetalous flowers and their rounded pods. 
I infer that it is also a prairie violet. The type sheet is from | 
Holmes, Polk Co., by Prof. MacMillan, Aug. 1900; the date i 
a late one for a violet to be in petaliferous flower, though the | 
locality is rather far north. The only other specimens which i 
I refer here are from the same northwestern section of the : 
State, Fergus Falls; and these were also obtained in Aug. ; 
1900, by C. A. Ballard; but they are out of flower, though 
exhibiting well a number of mature capsules. _ pS 
With the exception of the white-flowered V. Brainerdin : 
no other East North American violet—not even V. rotundi- 3 
