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CommentsThis is a rather coarse and weedy plant. During an early stage of its development, Rough Cinquefoil resembles Fragaria virginica (Wild Strawberry), but it later develops leafy flowering stalks with yellow flowers that fail to produce any fleshy fruits. Rough Cinquefoil differs from Potentilla simplex (Common Cinquefoil) by its trifoliate leaves and terminal inflorescence; the latter has palmate leaves with 5-7 leaflets and only axillary flowers. It also resembles Potentilla millegrana (Diffuse Cinquefoil) as both species have a similar growth habit and trifoliate leaves. However, Diffuse Cinquefoil has stems that are softly pubescent and smaller flowers (about ¼" across), while the stems of Rough Cinquefoil have coarse spreading hairs. Diffuse Cinquefoil is uncommon in Illinois and unlikely to be encountered; it more common further to the west.