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Family ISOETACEAE

Description: Aquatic or amphibious plants with a persistent, swollen root-stock (corm).

Leaves simple, crowded at the apex of the root-stock, ± terete or linear with broad, spoon-like bases. Most leaves act as sporophylls.

Sporangia embedded in the expanded basal part of the leaf, of 2 different kinds and giving rise to different sized spores.


Distribution and occurrence: World: 2 genera, c. 100 species, tropical to temperate regions. Australia: 1 genus, 15 species, all States.

External links:
Wikipedia

Text by Peter G. Wilson
Taxon concept:

One genus in NSW: Isoetes

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