Spathiphyllum wallisii, the peace lily, is a species of indoor houseplant in the family Araceae. The genus name means "spathe leaf", and the specific epithet is named after Gustav Wallis, a German plant collector. This photograph depicts an inflorescence of a S. wallisii potted plant in Lysekil, Sweden. The spadix is 2.7 centimetres (1.1 in) in length.Photograph credit: W.carter