marsh dayflower USDA PLANTS Symbol: MUKE
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Murdannia keisak (Hassk.) Hand.-Maz.

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Taxonomic Rank: Liliopsida: Commelinales: Commelinaceae
Synonym(s): marsh dewflower, aneilima, Asian spiderwort, wartremoving herb, marsh dayflower
Native Range: Temp. & trop. Asia (GRIN);

Appearance
Murdannia keisak is an annual, emergent plant that invades wetlands in the southeastern and northwestern United States. Plant stems are succulent, form roots at the nodes, and grow prostrate along the ground. Stems are 12-30 in. (30.5-76.2 cm) long.
Foliage
Leaves are alternate, lance-shaped, and up to 3 in. (7.6 cm) long.
Flowers
From September to November small, pink, 3-petaled flowers occur singly or in small clusters at the apex of the stems and in the leaf axils.
Fruit
The fruit is a capsule that contains several small seeds.
Ecological Threat
M. keisak invades water edges and marshes and often grows immersed. It forms dense mats that out-compete native vegetation. M. keisak is native to temperate and tropical Asia and was accidentally introduced into the United States, in South Carolina, around 1935.

Identification, Biology, Control and Management Resources

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


Plant(s); in flower
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); in flower
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Plant(s); in flower
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Linda Lee, University of South Carolina, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Linda Lee, University of South Carolina, 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.

U.S. National Parks where reported invasive:
Colonial National Historical Park (Virginia)



Invasive Listing Sources:
Alabama Invasive Plant Council
Faith Campbell, 1998
Georgia Exotic Pest Plant Council
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
Jil Swearingen, personal communication, 2009-2016
Mid-Atlantic Exotic Pest Plant Council, 2005
South Carolina Exotic Pest Plant Council
Tennessee Exotic Pest Plant Council
Virginia Invasive Plant Species List