Marsh Pennywort, or H .drocotyle vulgaris, L. an indigenous perennial plant, growing in marshy or inundated grounds; and flowering in the months of May and June.—This herb is supposed to occasion the rot in sheep : it certainly contains an acrid, poi-sonous juice, which, according to Bechstein, produces in the animals feeding on it, inflammations, bloody urine, and other mortal symptoms. Heme, every indus-trious farmer will endeavour to era-dicate the pennywort from his meadows.