HYDROCOTYLE, WATER-NAVELWORT: A genus of the digynia order, belonging to the pentandria class of plants; and in the natural method ranking under the 45th order, Umbellatae. The umbel is simple; the involucre tetraphyllous; the petals entire; the seeds are half round and compressed. There are several species, none of which are ever cultivated in gardens. One of them, a native of Britain, growing in marshy grounds, is supposed by the farmers to occasion
the rot in sheep. The leaves have central leaf-stalks, Hydrography with about five flowers in a bundle; the petals are of a reddish white.