Submerged annuals, occasionally perennating, monoecious. Roots 1-3 per node, simple, densely covered with long roothairs, penetrating substratum spirally. Rhizome creeping, matted, sympodial. Stems simple or sparsely branched, erect. Leaves ternate, opposite or alternate, linear, sessile, with a free cupular sheath subtending axils, or leafbase expanded into a folded sheath forming auriculate stipules above; axillary scales 2, minute. Flowers unisexual, solitary, or with a collateral vegetative bud or one of opposite sex beside it. Male flowers ephemeral, on long filaments (pedicels); anthers 4- or 8-sporangiate, with an apical knob; pollen globose, copious. Female flowers surrounded by a spathe, solitary or pseudo-umbellate; carpels (1-)4 or 5(-9), surrounded by a closely appressed flask-shaped 'perianth'; style exserted, tubular; stigma spoon- or funnel-shaped, large, with wavy membranous margins, ephemeral; ovule pendulous. Fruit a somewhat bean-shaped drupelet, stipitate and crowned with persistent style, pectinate on dorsal and occasionally on ventral side. Seed with a long, spirally coiled hypocotyl. x = 6 (7, 8) (polyploidy).
Species +/- 6 or 1 polymorphic species: Zannichellia palustris L., cosmopolitan, throughout sthn Afr. in brackish pans in arid areas and in estuaries and lagoons.

Add new comment

To prevent automated spam submissions leave this field empty.
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Enter the characters shown in the image.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith