Thalictrum flavum, known by the common names common meadow-rue and yellow meadow-rue, is a flowering plant species in the family Ranunculaceae, native to Caucasus and Russia (Siberia). Growing to 100 cm (39 in) tall by 45 cm (18 in) broad, it is an herbaceous perennial producing clusters of fluffy yellow fragrant flowers in summer. The flowers are composed of short sepals and longer, erect stamens. The subspecies T. flavum subsp. glaucum has gained the Royal Horticultural Society's Award of Garden Merit. The specific epithet flavum means "pure yellow".