Eel Grass - Meola Creek Variety

Family:
Hydrocharitaceae
Origin:
Europe, Asia, Africa & Australia.

General description

Submerged perennial freshwater <5.5m high depending on habitat. Bottom-rooting, stout rhizomes, forms dense beds. Light green leaves, long, flat ribbon-like at regular intervals along rhizomes. Inconspicuous flowers at end of a long spiral stem. Size of plant depends on habitat.
Please note Vallisneria spiralis var. tortifolia is not banned from sale. This plant has twisted leaves rather than the straight leaves of V.spiralis.

Static or flowing freshwater systems <9m deep. Tolerates low salinity. Grows fastest in water temperatures of 25°

Male plants only in NZ, no viable seeds. Spread locally by rhizomes. Intentional planting into new water bodies.

Dense beds of vegetation block dams & waterways impeding drainage, disrupting recreational activities, choking hydro turbines. Out-competes native species.

Site management

Virtually impossible to eliminate. Only treat if necessary, interference often makes problem worse. Regular follow up required.

Recommended approaches

1. Control small infestations using divers to hand-pull plants

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

Similar species

sagittaria
Sagittaria platyphylla

Sagittaria's submerged leaves look similar to eelgrass. Has erect leaves and flowers that are absent in eelgrass.

eel grass - Lake Pupuke variety
Vallisneria australis

V. spiralis is a smaller plant than V. gigantea. V. gigantea lacks the spiral flower stalks.

Search tags

RPMS status

Surveillance - Whole Region
eel grass - Meola Creek variety - Main species image