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*Murdannia keisak (Hasskarl) Handel-Mazzetti. Mud-Annie, Marsh Dewflower. Phen: Sep-Oct. Hab: Stream banks, canals, ditches, freshwater marshes (tidal and non-tidal), swamp forests, wet areas in bottomlands, wet disturbed places. Dist: Native of Asia, now widespread in the se. United States. M. keisak was introduced to SC and LA in the 1920s and 1930s, probably as a contaminant in rice seed, but the seeds now distributed by water and waterfowl; it is now a very serious invasive in a wide range of wetland habitats (Dunn & Sharitz 1990).

Origin/Endemic status: E. and se. Asia

Synonymy ⓘ: = Ar, C, FNA22, G, GW1, K1, K3, K4, Tn, Va, W, WH3, Pellegrini, Faden, & Almeida (2016), Tucker (1989); = Aneilema keisak Hassk. – F, RAB; = n/a – Tat

Links to other floras: = Murdannia keisak - FNA22

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL

Heliophily ⓘ: 7

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Will Stuart | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Bruce Sorrie | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Mat-forming, aggressively weedy, aquatic annual of stream banks, canals, ditches, freshwater marshes (tidal and non-tidal), swamp forests and wet disturbed places. Native of Asia, now widespread in the southeastern United States.

Stems: Stems reclining or prostrate, freely forking or branched, extensively creeping and rooting at lower nodes.

Leaves: Leaves alternate, sessile with tubular sheaths bearing stiff hairs, linear to lance-shaped, 3/4-2 3/4 in. long.

Inforescence:

Flowers: Flowers solitary from upper leaf axils or sheaths, or in small clusters of 2-4; pinkish- or purplish-white; about 1/3 in. wide; consisting of 3 oval petals and 6 bearded stamens (3 fertile and 3 non-fertile).

Fruits: Fruit an oval capsule.

Comments:

Height: 8-59 in.

plant sale text:

bloom table text:

description: Mat-forming, aggressively weedy, aquatic annual of stream banks, canals, ditches, freshwater marshes (tidal and non-tidal), swamp forests and wet disturbed places. Native of Asia, now widespread in the southeastern United States.

stems: Stems reclining or prostrate, freely forking or branched, extensively creeping and rooting at lower nodes.

leaves: Leaves alternate, sessile with tubular sheaths bearing stiff hairs, linear to lance-shaped, 3/4-2 3/4 in. long.

inflorescence:

flowers: Flowers solitary from upper leaf axils or sheaths, or in small clusters of 2-4; pinkish- or purplish-white; about 1/3 in. wide; consisting of 3 oval petals and 6 bearded stamens (3 fertile and 3 non-fertile).

fruits: Fruit an oval capsule.

comments:

cultural notes:

germination code:

native range: