Vascularisation de la fleur de Spathiphyllum wallisii

Abstract

The hermaphrodite flowers of Spathiphyllum wallisii have six tepals and six extrorse stamens. Gynoecia are either tri- or quadri-locular. In trilocular gynoecia, three dorsal bundles and three complex ventral bundles, each corresponding to the union of two simple ventral bundles belonging to adjacent carpels, are found in the ovarian wall. In the central axis of the ovary, three placental bundles rise to the level of ovular attachment. Each of these splits into two ovular traces. There are two ovules in each locule. When the gynoecium is quadrilocular, four placental bundles, four dorsal bundles, and four complex ventral bundles are usually present. In the flowers of Spathiphyllum wallisii, each carpel is vascularized by a dorsal bundle and by two simple ventral bundles. The path of the placental bundles is typical of that of Araceae with axile placentation.