Potentilla recta L.
sulphur cinquefoil, rough-fruited cinquefoil
sulphur cinquefoil, rough-fruited cinquefoil
July 2,
Blue Hills Reservation, Milton
A flower of sulphur cinquefoil. It was called so due to pale yellow color of its emarginate (notched) petals (one of the synonyms is P. sulphurea Lam.).