Northern beech fern (Phegopteris connectilis) growing in Voiluoto, Rauma — ⓘ

Phegopteris connectiliss (Voiluoto, Rauma) | Source

← order: Polypodiales

family

Thelypteridaceae

Marsh ferns

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3 genera:

Description

Ferns with blackish wiry roots. Rhizomes bear lanceolate non-clathrate scales. Stipes have crescent-shaped vascular bundles that unite towards the base of the blade to form a U-shape in cross-section. Sori are found on top of veins.

Occurrence map Marsh ferns (Thelypteridaceae) in Finland — ⓘ

Source

References:

Rothfels, Carl J., et al. (2012). A revised family–level classification for eupolypod II ferns (Polypodiidae: Polypodiales). Taxon, 61(3), 515-533. doi: 10.1002/tax.613003