Blechnum spicant

Photos taken on 23rd May on the "metasequioa path" in the wood.
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Blechnum spicant is a species of fern known by the common names deer fern or hard fern. It is native to Europe
and western North America. Like some other Blechnum it has two types of leaves.
The sterile leaves have flat, wavy-margined leaflets 5 to 8 millimeters wide,
while the fertile leaves have much narrower leaflets, each with two thick rows
of sori on the underside.