Как по Английски будет pfeifenkraut

Of or relating to the family piperaceae (the pepper family), comprising chiefly tropical, often aromatic, herbaceous plants, shrubs, lianas, and small trees, many of which provide products used as pungent spices.

An aquatic or marsh plant with leafless stems bearing heads of inconspicuous flowers, native to western ireland, the hebrides, and north america.