Miramar weed - Hygrophila polysperma
Family: Acanthaceae
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Status: Invasive
Location info:
Hygrophila polysperma is a freshwater amphibious herb which grows in deeper, moving water or along the banks. It may form dense stands from the bottom to the top of the water, sprawling across the surface. Hygrophila is frequently cultured as an aquarium plant.
Quick Facts:
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herbaceous perennial
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amphibious, "obligate" (requiring a wet habitat)
in freshwaters, mostly submersed, partly emersed
growing from bottom to surface in water to 10 feet deep, or found creeping along edges forming dense stands of stems in the water, later in the season breaking loose to form large floating mats rarely, terrestrial growth form grows in moist soil
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flowering in fall and winter
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reproduces asexually (regrows from plant fragments) and perhaps sexually (from seed), however Sutton (1996) says it's unknown whether seeds play a major part in its spread stems fragment easily and are able to develop new plants from small fragments; reportedly even a free-floating leaf can form a new plant
Website, video, and graphics by Rob Nelson
For more information on this plant or management please contact US Army Corp of Engineers
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