26 PITTONIA. 
reduced petals; a stem of this description sometimes’ arising 
from the same rootstalk with those having the usual scattered 
or solitary and petaliferous flowers; so that I see no warrant for 
accepting a variety, much less a species, with the name corymbosa. 
There is, however, one southern plant, though from the west- 
ward slope of the mountains, which must be admitted to be 
distinct from true V. Canadensis. 
V. DISCURRENS. Stems solitary, yet forming somewhat exten- 
sive colonies by a system of loosely connected slender horizontal 
whitish rootstocks bearing at their joints a few slender branching 
fibrous roots, each stem arising from a thickened and more 
coarsely fibrous-rooted terminus of the general rootstock: herb- 
age of a light green, remarkably thin and translucent when dry; 
leaves more rounded-cordate than in V. Canadensis and acute or 
cuspidate-acute rather than acuminate: peduncles apparently 2 
or 3 only; petals as large as, and much more broad and rounded 
than in V. Canadensis, scarcely tinged with any purple at first, 
but before falling changing wholly to a rich rather reddish pur- 
ple: fruit not seen. 
This fine violet, so clearly distinct by its subterranean parts, 
as well as by form and texture of leaves, and form and color of 
petals, is known to us only in Mr. Ruth’s n. 432 from near Knox- 
ville, Tennessee. The upper face of its foliage has some scat- 
tered short hairs, as in V. Canadensis, The stipules are small, 
and not attenuate. 
V. ruauLosa. Stouter than V. Canadensis, very erect and 
rather strict, from a thick suberect rootstock, notably pubescent 
throughout, least so as to the upper face of the leaves, these in 
part hairy only on the veins and veinlets, but the lower face, as 
also the stems and petioles hirsutulous: leaves thickish and 
somewhat rugose, from subcordate-reniform to very broadly 
cordate, always broader than long, and the largest nearly 3 
inches broad, all closely crenate-serrate, none acuminate but 
rather cuspidate-acute: stipules triangular, pubescent and cilio- 
late, greenish and not wholly scarious: peduncles few, not 
