248 
spatulate, dark violet, about equalling the sepals; stamens 10; 
styles free. (Plate 305, fig. 3.) 
This has generally been confused with 7. James, which it much 
resembles in habit. The main characters that distinguish the two 
are: in 7. heucheraeforme the petals are dark bluish violet, scarcely 
exceeding the sepals and comparatively narrow, and the styles 
free (see plate 305, fig. 3); in 7: Jamesi the petals are reddish 
purple, orbicular on a long claw, and often twice as long as the 
sepals, and the styles are united to near the top (see fig. 4). Both 
have 10 stamens, and differ in that respect as well as in habit 
from the other species of 7kerofon. In habit they much more re- 
semble Heuchera. They may constitute a fairly good genus; but 
the arctic 7: Richardsonii seems to connect them with the other 
species with 5 stamens, small white flowers and diffuse panicles. 
T. heucheraeforme extends from the Black Hills of South Da- 
kota to the Teton range of Wyoming and northward. The follow- 
ing specimens from Montana have been seen: Flodman, no. 514, 
July 28, 1896, from Bridger Mountains ; P. A. Rydberg, no. 2677, 
July 23, 1895, from Bozeman Cafion; Frank Tweedy, no. 255, 
1887, from East Boulder. 7. Jamesi (Torr.) Wheelock, is as far 
as I know, confined to the alpine peaks of Colorado. 
\ MITELLA VIOLACEA n. sp. 
Stem from a perennial rootstock, slender, about 3 dm. high, 
leafless, finely puberulent and with a few long silky hairs. Basal 
leaves on petioles 5—10 cm, long, the blade and petiole sparingly 
hispid, broadly cordate in outline, slightly 5—-7-lobed with rounded 
finely crenate lobes; raceme very short with small nearly sessile 
flowers ; flowers about 2 mm. in diameter ; sepals ovate, rather ob- 
tuse, very thin and petal-like, veined and tinged with violet; petals 
oblanceolate, entire or slightly 3-cleft, a little exceeding the sepals 
(Plate 305, figs. 1-2). 
In the form of the flower this stands nearest to JZ. adwwersifolia 
Greene. The sepals and petals are of the same size and form, 
but the former are generally tinged with violet and the latter less 
deeply 3-toothed, or entire. The leavesare broader and rounder 
in outline, the lobes shallower and rounder and evidently crenate. 
In other words the leaves are almost identical with those of J. 
pentandra Hook,, from which the plant is easily distinguished by _ 
the small, nearly sessile flowers and the form of the petals. With _ 
