Description. This grows from a root composed of many long and thick fibres. The leaves are long, slender, and sharp-pointed; they stand upright, and are of a deep green, and very rough and harsh to the touch; they are rounded on the back, and flat on the upper side, biggest at bottom, and smallest at the extremity. The stalk is slender and green: there are no leaves on it, but at distances single flowers appear, which are four leaved, of a greenish white, and seldom quite open.
Place. It is found at the bottom of fish-ponds in the northern part of England and Wales:
Time. It flowers in August.
Government and virtues. This is a Lunar plant, The flowers are seldom used, but the leaves are put in cooling ointments, being accounted good for burns, inflammations, and hot swellings, and are an ingedient in the Unguentum Populeon.