4 PITTONIA. 
large, blue, more than an inch in diameter, the lamina of 
the petals broadly and obtusely obovate, the claw and the 
base of the blade white and densely white-hairy, the hairs 
flattened: sepals lanceolate, acutish, wholly glabrous: apet- 
alous flowers not seen, but doubiless aerial. 
This is one of the most distinct violets of Maryland, 
though doubtless uncommon, and I am confident it has 
never been described. It inhabits grassy uplands along the 
borders of forests looking northward, and holds a place 
almost exactly intermediate between such widely different 
species as V. cucullata and V. emarginata, exhibiting almost 
the foliage of the latter, and flowers as much resembling 
those of the former, though the petals are broader, of a 
deeper blue, and the plant decidedly more showy when in 
petaliferous flower. Though the mature plant is multicip- 
itous, the younger ones, at first flowering from seed, are sol- 
itary; and in this eondition the species would be very apt 
to pass for V. emarginata with the inexpert. My specimens 
are from Anne Arundel Co., Maryland; but I have seen it 
in one other station, and that along the railway towards 
Harper's Ferry. Where it occurs it is rather plentiful; and, 
as it is associated with no other violet whatsoever, it can not 
be of hybrid origin. 
V. SUBSINUATA. V. emarginata, var. subsinvata, Greene, 
Pitt. iii. 319. A further study of this beautiful violet of the 
mountains of eastern Tennessee reveals characteristics which 
declare it quite distinct from V. emarginata. Its leaves are 
of a firmer texture, less succulent, and on notably and con- 
stantly shorter petioles; and they are pubescent, after the 
manner of what is supposed to be V. palmata; to which, in- 
deed, the plant is more nearly related than to V. emarginata ; 
for its apetalous summer flowers are horizontal and at least 
partially buried; a condition of things not occurring in any 
of the group to which V. emarginata belongs. "The peduncles 
of the petaliferous flowers are very slender, ascending rather 
than erect, and the petals, always of a lighter blue, are broad 
and obtuse, never emarginate. 
