limnophila USDA PLANTS Symbol: LISE3
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Limnophila sessiliflora (Vahl) Blume

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Taxonomic Rank: Magnoliopsida: Scrophulariales: Scrophulariaceae
Synonym(s): Asian marshweed, Ambulia, ambulia, limnophila

Appearance
Limnophila sessiliflora is a rooted, aquatic, perennial, herbaceous plant that grows up to 12 ft (3.7 m) tall. It is fast growing, grows new plants from fragments, and can exist in a variety of aquatic habitats.
Foliage
Leaves of this plant have two types of whorled polymorphic leaves. The submerged stems have dissected, dark green, lance shaped leaves up to 1.2 in. (30 mm) long with irregularly serrated margins. The emergent stems have flat shiny hairs and fine, needle like leaves up to 0.12 in. (3 cm) long.
Flowers
The small flowers are sessile and arise singly from the leaf axis. The violet, lavender, pink, or blue flowers have five fused petals that form a tube. The floral tube has two lips, which have distinct purple lines on the undersides. The five sepals are green and hairy. Sepals are from 0.16-0.2 in. (4-5 mm) long.
Fruit
The fruit is an ellipsoid capsule that can contain up to 150 seeds.
Ecological Threat
L. sessiliflora can shade out and out compete other aquatic plants. It can tolerate a wide range of growing conditions. L. sessiliflora is listed as a Federal Noxious Weed.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Seed(s); Seeds, hilum at bottom. FNW taxon.
Julia Scher, USDA APHIS PPQ, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s); Fruit. FNW taxon.
Julia Scher, USDA APHIS PPQ, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s); Fruit. FNW taxon.
Julia Scher, USDA APHIS PPQ, Bugwood.org
Additional Resolutions & Image Usage

Seed(s); Hilar end of seed. FNW taxon.
Julia Scher, USDA APHIS PPQ, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.


Invasive Listing Sources:
Florida Exotic Pest Plant Council
Georgia Exotic Pest Plant Council