9 
POTENTILLA RECTA L. Sp: Pl: 497.0 1753. 
It somewhat resembles P. Nuttal/ii in pubescence and general 
habit, but differs in being paler and in its large pale yellow petals. 
It is of European origin and occurs sparingly in the Eastern 
States to the District of Columbia and‘to Ohio. : 
The Argenteae resemble in general habit the preceding group. 
The plants are very leafy, the leaflets generally 5 or those of the 
upper leaves only 3, the flowers many and small, and the petals 
scarcely exceed the sepals. The group is: European, only P. 
argentea being also a native of North America. 
POTENTILLA INTERMEDIA L, Mant. 1: 76. 1767. 
_This species very much resembles P. Monspeliensis, especi- 
ally var. Norvegica, and has in this country been mistaken for it 
It differs mainly in the mostly 5-foliolate leaves, the perennial 
root and the style. The species is sparingly introduced in the 
East. Some ofthe specimens are: 
New Fersey and New York: Addison Brown, 1881 and 1880. 
POTENTILLA INCLINATA Vill. Hist. Pl. Delph. 3: 567. 1789. 
P. canescens Besser, Prim. Fl. Galic. 1: 330. 1809. 
It much resembles the preceding species, but differs in a more 
slender and simple stem and the grayish pubescence. The only | 
Specimens collected on this continent that I have seen are those 
collected in Ontario by Fowler. 
POTENTILLA ARGENTEA L. Sp. Pl., 497. 1753- 
P. argentea is one of the easiest to identify, by its small flowers, 
deeply dissected leaves, which are white-tomentose, especially be- — 
neath, and have revolute margins. It is a native of Europe and 
Asia, as well as of America. In this country it extends from Nova 
Scotia and the District of Columbia to Dakota and Kansas. 
“ 
POTENTILLA COLLINA Wibel, Prim. F]. Werth., 267. 1799. 
This is another species that has been collected in the country 
at least once, viz., by J. M. Holzinger (no. 30) at Winona, Minn.,” 
in 1887. It differs from P. argentea, which it most resembles, by — 
its prostrate or spreading habit, less white-tomentose leaves, which 
have broader lobes, and ie not revolute eee oe 
