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Symoens, J.J. (2009) Hydrocharitaceae Flora Zambesiaca 12(2)
Submerged, marine perennials. Stems elongate, rhizomatous or shortly erect. Roots 1(–3) at each node where the erect stems produced, sand binding, covered with fine hairs. Leaves in pairs, whorls or distichously arranged on the erect stems, sessile or petiolate; blade linear to ovate, opaque or somewhat translucent, usually glabrous; margins green, entire or serrulate. Stipules 2, subtending each pair or whorl of leaves. Flowers spathes, solitary in leaf-axils, sessile, 1–2-flowered, composed of 2 free, overlapping bracts, translucent, the margins entire or serrulate; tepals 3, ovate, cucullate. Fruit ovoid to globose, membranous, opening by decay of pericarp. Seeds subglobose to globose, tuberculate. Worldwide: Eight species, four of which are found in East African coastal waters. Mozambique: 4 taxa. |
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| Species | FZ divisions | Content |
| minor (Zoll.) Hartog | N | |
| ovalis (R. Br.) Hook. f. subsp. linearis (Hartog) Hartog[End] | GI,M | |
| ovalis (R. Br.) Hook. f. subsp. ovalis | N,GI,M | |
| stipulacea (Forssk.) Asch. | N |
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