Thelypteris is a large genus of 500 or so species of deciduous, terrestrial ferns from swamps and bogs around the world. The pinnate fronds are lance-shaped and have sori on their undersides. They spread from creeping rhizomes. Use in a moist border or at waterside.
Noteworthy CharacteristicsT. palustris may be invasive.
CareTolerates most any moist, moderately fertile soil in full sun or partial shade.
PropagationDivide in spring or summer, or sow spores at 59°F as soon as ripe.
ProblemsRust, scale insects, and leaf curl sometimes affect plants.