Family : Thelypteridaceae.

Marsh fern.

The fronds are upright and lanceolate, light green. With its creeping rhizome, it spreads in moist grounds to swamps, or along pond margins, and can colonise under water to a depth of 30cm, in full sun or medium shade. It enjoys alkaline soils but stands acidity. Deciduous. Height : 50/100cm. Hardiness : -30°C.