265 
the stipules long-acuminate, scarious and brown, the sepals nar- 
rower and the style not thickened and glandular at the base. It 
is not rare in northern and alpine Europe and Asia, but I have 
seen only the following specimens from America. 
Great Slave Lake: Miss E. Taylor, 1892. Hudson Bay: R. 
Bell, 1880. ‘ 
POTENTILLA PULCHELLA R. Br. Ross’ Voy. Ed. 2, 2: 193. 
P. pulchella is generally a very small plant, tufted with many 
spreading items from the perennial root. The stems are generally 
less than 1 dm. long, but in one specimen seen fully 3dm. The 
leaves have only two pairs of leaflets, and the terminal leaflet is 
generally sessile. It is generally quite hairy with long and yel- 
lowish white hairs. In general habit and flowers it comes near 
P. Vahliana, which has been mistaken for it; but the latter has 
always - only 3 leaflets. Spitzbergen, Greenland, arctic coast of 
America, and Wrangle Island, off the coast of eastern Siberia. 
PoTENTILLA SOMMERFELTIT Lehm. Del. Ind. Sem. Hamb. 1849: 6. 
1849. 
Closely resembles P. pulchella, but is still smaller and differs in 
the smaller flowers, the lack of the long hairs, and the stalked 
terminal leaflet. It is a native of Spitzbergen and Greenland, but 
One specimen at least has been collected on the American Conti- 
nent. It was sent to Dr. Torrey from Dr. Hooker, but the collec- 
tor’s name does not appear on the label. 
A neglected Species of Oxalis and its Relatives. 
By Joun K. SMALL, 
The problem of drawing satisfactory lines between several — 
Species of Oxalis belonging to the group of which 0. corniculata — 
may be taken as the type, has apparently never been solved. © 
Several forms of Oxalis exist in eastern North America, whose - 
dispositions in our systematic works many botanists have not been 
able to understand satisfactorily. The plants referred to in this 
particular case are close relatives of Oxalis aenawae Ley mene have 
