The stigma of the female floral organ which matures first pushes apart the marginal flaps of the furrow and widens it (Fig. 3d and e) emerging to the exterior (Fig. 4a), the stamen soon takes over and the anther lobes become prominent on the dorsal surface of a flowering frond (Fig. 4b–d). The stigma of a mature female floral organ produces an exudate which is placed like a droplet on its funnel shaped upper surface (Fig. 4e). Upon maturity, the bi-lobedanther dehisces (Fig. 4d and f) releasing the pollen grains (Fig. 4g)which are attracted by the stigma. A group of W. microscopica fronds in a flowering state is a very frequent view (Fig. 4d). The formation of organs of perennation, turions, could not be observed in this species, neither in nature nor during cultivation under various controlled conditions.