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Genus Egeria Family Hydrocharitaceae

Description: Dioecious aquatic perennials with submerged whorled leaves and floating flowers.

Leaves in whorls of 3–8.

Flowers axillary, unisexual. Spathe compressed-ellipsoid, with cleft down one side, better developed in male flowers. Hypanthium thread-like. Perianth in 2 whorls, each of 3 segments, outer sepaloid, the inner larger and petaloid. Male flowers 2–4 per spathe, separating early and becoming free-floating; stamens 9. Female flower solitary, the spathe split on 1 side.

Fruit capsular; seeds 1–5.


Distribution and occurrence: World: 2 species, South America. Australia: 1 species (naturalized).

Text by S. W. L. Jacobs
Taxon concept:

One species in NSW: Egeria densa

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