Relating to or belonging to the Fontinalaceae family of aquatic plants that inhabit springs and running water.
Adjective form derived from 'Fontinalaceae' by adding the English adjectival suffix '-ous,' used to describe organisms or characteristics that belong to this plant family or resemble them.
The fontinalaceous flora of European mountain streams looks almost alien underwater—delicate feathery fronds that sway in the current but are actually incredibly tough and can survive freezing conditions.
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