Shrubby Cinquefoil.Potentilla fructicosa.Prairie Weed.
Found from July to September, in pastures and springy meadows.
This bushy, branching, and very leafy plant grows from 1 to 3 or 4 feet high; it is tough, and woody-fibred, with a thin bark, roughened by hairs. Dull tawny-brown in color, dark at the foot. The new shoots are covered with white down.
The leaf is divided in 3 to 7 long, narrow, and oblong leaflets that are pointed at each end, with entire margins, the edge being rolled under; the texture is thick, and the surface hairy. In color a dull yellow-green, the under surface whitish. The leaves, on short slender stems, are placed in little groups, close together.
The flower is larger than those of the other Cinquefoils described; of 5 rounded petals, with slender bases, fine texture and smooth surface; strong yellow in color. There are many short, dark-tipped stamens. The calyx is 5-parted, with an equal number of alternating bracts beneath; it is shining smooth on the inside and downy without; yellow-green, the bracts being greener,—they are also less downy. The flowers, on short downy stems, form leafy close terminal groups.
Possessed of an almost indestructible toughness, and rapid in growth, this plant is one of the worst of pests, sometimes usurping a whole field, from which it is a formidable task to dislodge it. It has been largely introduced into western Vermont through garden cultivation. The petals fall quickly; seen in great masses the general hue is coarse and unpleasing.