Herzog salvinia
Salvinia herzogii de la Sota


Giant salvinias are a group of free floating ferns native to South America. Species include Salvinia molesta, S. auriculata, S. biloba and S. herzogii. They have been spread to the tropics and subtropics, moved in part by the trade in ornamental plants for fish tanks and ponds. Each plant has an internode, a node, a pair of floating leaves, the submerged or root, and associated buds. The root is actually a modified leaf that looks and functions like a root.
Giant salvinias have a horizontal rhizome just beneath the water surface. On the abaxial leaf surface are hairs that are divided but joined at the tips of the hairs. These hairs have an egg-beater-like appearance.
Giants salvinias reproduce by buds, both apical and axillary.
Ecological Threat
Giant salvinia forms dense mats over lakes and slow moving rivers and causes large economic losses and a wide range of ecological problems to native species and communities. It can impede access to and use of waterways for commercial and recreational purposes. Mats of giant salvinia can reduce habitats for game birds and limit access to fishing areas. Salvinia can clog water intake pipes and interfere with agricultural irrigation and water supply.


State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

Taxonomic Rank

Kingdom: Plantae
Phylum: Pteridophyta
Class: Filicopsida
Order: Hydropteridales
Family: Salviniaceae
Genus: Salvinia
Subject: Salvinia herzogii de la Sota


Plants - Aquatic Plants