GS- one ramet5

One ramet of GS (shown here) under ideal conditions can grow into 25,000 + acres within 3 months.


  • A 1995 outbreak in South Carolina was the earliest U.S. record of Salvinia molesta outside of cultivation.
  • The distribution and spread of Salvinia molesta (giant salvinia) has progressed from independent introductions across the southern United States.
  • Salvinia molesta was discovered on Lake Bistineau in February of 2006.
  • In 2009, Salvinia molesta covered as many as 8,000 of the 17,000 acre lake.


  • Salvinia molesta, commonly known as giant salvinia , is an aquatic fern, native to south-eastern Brazil; It is a free floating plant that does not attach to the soil, but instead remains buoyant on the surface of a body of water.
  • Salvinia molesta,  reproduces by asexual reproduction only, but it is capable of growing extremely quickly, starting from small fragments and doubling in dry weight every 2.2-2.5 days;  It grows from fragments that have broken off or dormant buds that have been detached from the main plant; Each node has five buds so potential for great & rapid spread is high.
  • The result of the rapid growth rate of Salvinia molesta has resulted in its classification as an invasive weed in some parts of the world such as Australia, New Zealand and parts of America; Surfaces of ponds, reservoirs, and lakes are covered by a floating mat 10–20 cm (in some rare cases up to 60 cm) thick.
  • Salvinia molesta’s growth clogs waterways and blocks sunlight needed by other aquatic plants and especially algae to carry out photosynthesis thereby oxygenating the water; As it dies and decays, decomposers use up the oxygen in the water.

040814_BTF-letterClick on the image to read this April, 2014 letter.