188 PITTONIA. 
auricles with a few marginal forked hairs; stems and also 
pedicels of the flowers glabrous: flowers rather more than 
1 inch long (much larger than in the U.S. segregates); sepals 
with a few scattered stellate hairs and a conspicuous white 
scarious margin; petals twice the length of the sepals and 
with broad round-obovate somewhat spreading limb, ap- 
parently white, acquiring a blush of rose in drying: anthers 
sagittate: ovaries and young pods glabrous: pods somewhat 
deflexed. 
This description is drawn up from Greenland material in 
the herbarium of Mr. Theo. Holm collected by himself; 
and I have seen no even high-northern continental speci- 
mens that match them. The nearest approach to them is 
made by Canadian specimens which, as I suppose, fairly 
represent the following: 
À. RETROFRACTA, Graham. While closely resembling A. 
Holbrellii in habit, and the pubescence of the leaves, the 
stem is more hirsutulous than stellate-hairy; the radical 
leaves are not entire but dentate; the flowers are of only 
half the size, much more numerous, and with rose-colored 
petals which are spatulate-oblong, with little distinction of 
claw and limb, and the exserted portion is stellate-roughened 
up and down the middle of the back; and lastly, the pods 
are longer and narrower, on shorter pedicels, and distinctly 
refracted, i. e., holding a position almost parallel to the axis 
of the raceme. 
This plant is well illustrated in the Canadian Survey 
Herbarium at Ottawa, under n. 10,304, from Wood Moun- 
tain Post, Assiniboia, 10 June, 1895, and by n. 18,110, from 
Crow Nest Pass, Alberta, Aug., 1897, both collected by Mr. 
John Macoun. I note that Mr. Howell, in his Northwestern 
Flora, has taken up the name A. retrofracta, but, as it appears 
from the description, for a plant very different from this. 
