NAT. ORDER. 
Rosacea. 
POTENTILLA ATRO-SANGUINEA. BLOOD-COLORED CINQUEFOIL. 
Class XII. Icosandria. Order V. Polygynia. 
Gen. Char. Calyx, ten-cleft. Petals, five. Seeds, roundish, naked, 
fastened to a small juiceless receptacle. 
Spe. Char. Leaves, interruptedly pinnate, serrate, silky underneath. 
Stem, upright. Peduncles, one-flowered. 
This beautiful plant rises to the height of about three and a half 
feet : the stem is erect, round, hairy, branched, and rather pilose ; the 
leaves interruptedly pinnate, clothed with hoary tomentum ; large leaf- 
lets oblong-, truncate, deeply serrated, smaller ones quite entire, about 
the size of the segments of the larger ones ; stipules lanceolate, usually 
entire, but sometimes with a few teeth ; petals obcordate, a little longer 
than the calyx. This plant is a native of North America, the southern 
part of Europe, and is found in considerable quantities in Siberia. It 
flowers from July till September. 
Perhaps no plant, bearing the open air in our climate, produces 
flowers of a richer hue than the present, which is an hybrid, and very 
much resembling the Potentilla nepalensis, but far exceeding it in both 
beauty and size. It is perfectly hardy, braving the severest winters 
of this country with impunity. 
Propagation and Cidture. All the species of Potentilla are of 
easy cultivation, and most of them quite handsome when in flower. — 
They will grow in any common garden soil, and are easily increased 
by dividing the plants or by seed. The shrubby kinds are very pro- 
Vol. in.— 169. 
