Salvinia auriculata: Water Salvinia

Salvinia auriculata, Water Salvinia, is a small, free-floating aquatic fern native to South America. It has a horizontal stem (rhizome) floating just below the surface, producing pairs of floating, oval, hairy leaves (fronds) and a submerged, root-like, highly divided leaf. The floating leaves have rows of arching, egg-beater shaped hairs on the upper surface that trap air, providing buoyancy. It forms dense mats.

Plant Profile

Water Salvinia grows rapidly on nutrient-rich, still freshwater in tropical and subtropical regions. It can become a severe invasive weed, blocking light and oxygen. It is regulated in many jurisdictions. In controlled water gardens, it provides shade and habitat but requires strict management. The unique egg-beater hairs are a marvel of plant engineering. A fascinating but dangerous aquatic fern.