Damasonium californicum

Damasonium californicum is a species of perennial wildflower in the water plantain family which is known by the common name fringed water-plantain, or star water-plantain. D. californicum is a plant of wet environments in the western United States including Washington state, Oregon, northern California, Idaho, Nevada, and Montana. It is a resident of ponds, riversides, and vernal pools. This is a tough-stemmed plant which may live submersed in water or erect on mud or moist soils. It grows to 20–45 centimeters (8–17+1⁄2 inches) above water. It has narrow basal leaves consisting of a thin blade, 2.5–7.5 cm (1–3 in) long, at the end of a long petiole. The inflorescence yields a flower at the end of each of several long peduncles. The flower has three white or pink petals, each with toothed or fringed ends and sometimes a yellow spot at the base. At the center are six short stamens. After the flower withers the narrow fruits within develop into flat, beaked achenes, several achenes gathe......read more on Wikipedia.