Swaziland's Alien Plants Database

Azolla filiculoides Lam.
Red water fern
Invasive, Swaziland Status Unknown
Origin: Tropical South America
Growth Form: Aquatic herb
Plant Description: Plant: Perennial, mat-forming, free-floating, aquatic fern with horizontal stems up to 25–35 mm long; branching pattern is loosely alternate (as opposed to regularly pinnate in the indigenous A. pinnata); roots without fine laterals (as in A. pinnata). Leaves: Silvery-green turning reddish-brown or purplish in winter, 1.0–1.5 mm long, broadly ovate to almost circular, apices blunt. Fruit: Minute, in the axils of the leaves, October–February; reproduction also occurs from detached plant fragments.
Key Features:
Control: Biological: Effective agents available. Occurrence in South Africa has been greatly reduced by biocontrol.
Comments: Possible

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