Swaziland's Alien Plants Database

Pistia stratiotes L. ARACEAE Water lettuce Unknown, Swaziland Status Unknown Origin: South America (Brazil). Growth Form: Aquatic herb Plant Description: Plant: Perennial, mat-forming, usually free-floating aquatic plant, seldom exceeding 150–200 mm in diameter; plants consist of a rosette of leaves with a tuft of long, fibrous roots beneath and resemble floating lettuces. Leaves: Pale yellow-green, narrower at the base, rounded, straight or notched at their tips, ribbed, with many longitudinal veins radiating from the base, softly hairy on both surfaces. Flowers: Pale green or white, inconspicuous, February–May(–all year). Fruit: Small, green capsules. Key Features: Control: Comments:

KEY   Confirmed (herbarium specimen)   Visual record   Suspected Click on map grid square to view record information for each grid square.

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