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Molluginaceae family (1 species)

Mollugo nudicaulis
, Encycl. 4(1): 234.  1797.

Indigenous/naturalized? herb of moist spots in very arid coastal rocky areas.
Rare, along the Atlantic coast.
Native to the Old World?
Grows and flowers quickly in wet spells.

With a wide neotropical distribution I am not sure why it is considered exotic.