3797

Emergent aquatic (rooted); Forb
Perennial

Non-native: Eurasia & Africa

Documented growing wild in - - -

Rare

Look for it in farm ponds and other stagnant or slow-moving water, per Weakley's Flora

To see a detailed map, click here

INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

• Forest Health Assessment & Applied Sciences Team: New Invaders of the Southeast
• SC Department of Natural Resources Aquatic Nuisance Species List, 2003
• SC List of Regulated Pest Plant Species, 2017
• Tennessee Exotic Pest Plant Council, 2009
• Virginia Department of Conservation and Recreation, 2014

 

 

IS THE PLANT "ARMED"?
Fruit armed with 2-4 prominent spines

LEAVES:
Submerged leaves finely divided, feather-like; floating leaves simple
Submerged leaves alternate; floating leaves in a rosette at water's surface
Petioles of floating leaves 2-6' long

FLOWER:
Summer/Fall
White (inconspicuous)
4 sepals
4 petals

Flowers borne in the center of the rosette of floating leaves

FRUIT:
Nut-like

 

TO LEARN MORE about this plant, look it up in a good book!

• Invasive Plants, Guide to Identification, Impacts and Control p419
• New Invaders of the Southeast p107

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Malvids: Myrtales

WEAKLEY'S FLORA (11/30/12):
Trapa natans   FAMILY Lythraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Trapa natans   FAMILY Trapaceae