Marsh-Locks, the Purple, or Marsh Cinquefoil, Com Arum Palustre, L. an indigenous perennial plant, growing in muddy and putrid marshes; flowering in the months of June or July; and producing red berries in autumn.-The whole plant may be usefully employed in tanning calf-skins.— The Irish, who dispose of milk in the streets, rub the inside of their pails with this herb; in consequence of which the milk appears to be thicker and richer.- The roots of the marsh-locks produce in dyeing an indifferent red colour. - Goats eat the plant, but it is not relished by either cows or sheep, and totally refused by horses and hogs.