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  2. Wildflowers and Ferns of Black Lake Bog SNA
  3. northern marsh fern (Thelypteris palustris)

northern marsh fern (Thelypteris palustris)

Thelypteris palustris

Description 2

• Fronds: once compound, 6 to 30 inches long, 3 to 7 inches wide, lanceolate shaped in outline, leaflets deeply lobed, divided almost to mid-nerve, lobes up to ¾-inch long, oblong to triangular, toothless with a blunt to pointed tip, veins extend to edge of lobe and are mostly forked
• Spores: on back of fertile leaves, which are taller and narrower than infertile leaves, round groups of spores covered by tissue, in a row on both sides of lobe midvein, attached on the veins, leaf edges slightly roll under, partially covering spores
• Fruiting season: Summer
• Height: 6-30 inches
• Habitat: bogs, marshes, wet meadows, seeps, fens, along shores

Fontes e Créditos

  1. (c) Homer Edward Price, alguns direitos reservados (CC BY), http://www.flickr.com/photos/28340342@N08/2974070021
  2. (c) Minnesota Scientific and Natural Areas, alguns direitos reservados (CC BY-SA)

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