Marsh Fern T. palustris
Order: Polypodiales Family: Thelypteridaceae Genus: Thelypteris
General Characteristics:
-A common wetland fern; each frond arising individually from a creeping rhizome without forming clumps.Fronds monomorphic or slightly dimorphic, deciduous.
-Fertile leaves more erect, narrower, with leaf edges slightly rolled over spore-bearing sori, 9"-36" tall.
-Petiole (leaf stalk) smooth and pale green above, black at base, sparsely set with smooth, tan, ovate scales, 3½"-18". Petioles of fertile fronds much longer than those of sterile.
-Leaflets deeply cut to within 1mm of rib; lobes oblong, with smooth edge. About a dozen per frond, they are all perpendicular to the stem.
-Sori round, on underside of fronds near the midvein, tan & often hairy
-Distinguished from the closely related Long Beech Fern (Phegopteris connectilis), by its lowest leaflets growing perpendicular to the stem.
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