*Murdannia keisak (Hasskarl) Handel-Mazzetti. Common name: Mud-Annie, Marsh Dewflower. Phenology: Sep-Oct. Habitat: Stream banks, canals, ditches, freshwater marshes (tidal and non-tidal), swamp forests, wet areas in bottomlands, wet disturbed places. Distribution: 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, K4, Tn, Va, W, WH3, Pellegrini, Faden, & Almeida (2016), Tucker (1989); = Aneilema keisak Hassk. — F, RAB; = n/a — Tat. Basionym: Aneilema keisak Hassk. 1870
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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© Keith Bradley | Original Image ⭷
© Will Stuart | Original Image ⭷
© Bruce A. Sorrie | Original Image ⭷
© Bruce Sorrie | Original Image ⭷Feedback
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Horticultural Information
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:
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