Tags: Fern.

Wessiea is an extinct monotypic genus of fern in the Dryopteridaceae family with the sole species Wessiea yakimaensis. Wessia is known from Langhian age Miocene fossils found in Central Washington.The genus was described from specimens of slicified rhizomes and frond bases in blocks of chert. The cherts were recovered from the Ho ho site one of the county line hole fossil localities north of Interstate 82 in Yakima County Washington.

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