Pistia stratiotes Linnaeus. Water Lettuce. Hab: Stagnant or slow-moving waters of rivers, sometimes cultivated in ponds, where it persists for a while (presumably eventually eliminated by cold winters in the more northern parts of our area). Dist: Native in a wide area across the Paleotropics and Neotropics, including in North America at least peninsular FL; it has been sometimes considered an alien and noxious waterweed in FL but evidence strongly supports its nativity there (Evans 2013). Reported for AR (Serviss & Serviss 2023a). This floating aquatic appeared in the Waccamaw River of SC (downstream from NC) in 1990 and 1991, apparently successfully overwintering (Nelson 1993).

Origin/Endemic status: Native

Synonymy ⓘ: = ETx1, FNA22, GW1, Il, K1, K3, K4, NcTx, NY, S, S13, Tx, Va, WH3, Spaulding et al (2019); = n/a – C, F, RAB, Tat

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL
• Eastern Mountains and Piedmont: OBL
• Great Plains: OBL
• Midwest: OBL
• Northcentral & Northeast: OBL

Heliophily ⓘ: 8