Hill Meadow Rue is an erect herb with perennial roots, growing up to half a meter tall. Leaves are 3-foliolate rarely 2-ternate. Leaflets are circular, 3-5 cm in diameter, with margins crenately lobed or toothed. Flowers white, fascicled at the ends of the branches. Flowers are about 1 cm in diameter, with 4-5 petal-like sepals. Petals are absent. Many protruding filamentlike stamens are prominent. Achenes many, sessile, ribbed. Flowering: August.