on the oxygenated water brought along with fast currents for survival. Facultative rheophytes are just as adapted to survive in areas where fast currents run through, but are not dependent on these fast currents to survival.

When low water levels occur, obligate rheophytes often quickly begin to flower to take advantage of these occurrences.

Examples of rheophytic plants are Asplenium obtusifolium, Osmunda lancea, and Tectaria lobbii

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