Alisma triviale
A smooth, succulent 2' plant with an unusual structure. There is a basal rosette of 6" oval leaves, each with a small sharp tip and a long celery-like stalk. There are no leaves above the rosette. The stem repeatedly divides in whorls of side branches, the outermost bearing tiny 1/4" flowers on long stalks. There are 3 green, striped, triangular sepals and 3 widely separated, oval white petals. In the center is a light green button bearing a few stamens. Blooms June- September in shallow water, mud, swampy areas.