The Alismatidae
Family Overview - Najadales

Zosteraceae - the Eel-grass Family

Diversity:  Submersed marine herbs growing wholly submerged at depths of up to 50 m.  Three genera with about 18 species.

Distribution:  Worldwide and limited to sea coasts of subtropical to subarctic areas, of major importance, in terms of both ecology and economics, as primary producers in coastal habitats..

Floral structure:  Flowers highly reduced, hydophilous, unisexual, and sessile in two rows along a spadix which is subtended by a spathe.  Pollen grains filamentous, up to 2mm long.

Significant features: From the broad perspective of plant evolution, a flowering plant lineage that has returned to the marine home.  Reproductive adaptations are highly specialized.


image from the Delta family description

More information on the Zosteraceae and also the Seagrass page.

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