Potentilla norvegica

Potentilla norvegica, known in English as "rough cinquefoil" or "Norwegian cinquefoil" and in French as potentille norvégienne or potentille de Norvège, is an annual, biennial, or short-lived perennial native to the temperate northern hemisphere. The dainty yellow flowers have five petals, and five sepals which are longer than the petals and protrude between them. Despite the English common names ("cinquefoil" means "five leaves"), the compound leaves have three leaflets rather than five. If you click the photo to enlarge it you will see they, and the stems, are covered with fine hairs.