It has narrow, shortstalked leaves and inconspicuous, apetalous, unisexual flowers borne in short spikes.
The genus Myrica is the type of a small, but widely distributed order, Myricaceae, which is placed among the apetalous families of Dicotyledons, and is perhaps most nearly allied to the willow family.
The starting-point of the class, however, and the position within it of apetalous families with frequently unisexual flowers, have provoked much discussion.
The flowers of Halophila are submerged and apetalous.
- Monochlamydeous (apetalous) flower of Goosefoot (Chenopodium), consisting of a single perianth (calyx) of five parts, enclosing five stamens, which are opposite the divisions of the perianth, owing to the absence of the petals.