Molinia - Wikipediaen.wikipedia.org › wiki › Molinia
Molinia, or moor grass, is a genus of two species of flowering plants in the grass family, native to damp moorland in Eurasia and northern Africa. They are both herbaceous perennial grasses. The genus is named after Juan Ignacio Molina, a 19th-century Chilean naturalist. Species. Molinia caerulea (L.)

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Note added at 1 hr (2020-07-28 15:22:50 GMT)
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https://pl.wikipedia.org/wiki/Łąka_trzęślicowa

A wet meadow is a type of wetland with soils that are saturated for part or all of the growing season. Debate exists whether a wet meadow is a type of marsh or a completely separate type of wetland. Wet prairies and wet savannas are hydrologically similar.

https://en.wikipedia.org/wiki/Wet_meadow#:~:text=A wet meado...

A wet meadow is a type of wetland with soils that are saturated for part or all of the growing season. Wet meadows may occur because of restricted drainage or the receipt of large amounts of water from rain or melted snow. They may also occur in riparian zones and around the shores of large lakes.

https://www.pacificforest.org/habitat/wet-meadow/

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Note added at 4 hrs (2020-07-28 18:26:27 GMT)
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If appropriate, there is also the term "seasonally wet meadow."

Dwarf bilberry occurs in open or semi-open habitats in the Upper Peninsula on dry, sandy soil. It is also found in seasonally wet, meadow-like areas intermixed with dry northern forest and dry sand prairie.
https://mnfi.anr.msu.edu/species/description/14075