Flora of the Southeastern United States

*Oshuna crassipes (Martius) A. Haines. Common name: Water-hyacinth. Phenology: Jun-Sep. Habitat: Ponds, ditches, sluggish water. Distribution: Native of tropical America. O. crassipes is "generally considered the world's most serious aquatic weed" (Rosatti 1987). Originally native to tropical South America, O. crassipes is now a widespread naturalized weed throughout the tropics and subtropics. In the northern part our area, water hyacinth is rare, probably not long persisting. Farther south, it can be an aggressive aquatic weed.

Origin/Endemic status: South America

Synonymy ⓘ: = Haines (2021); = Eichhornia crassipes (Mart.) Solms — Ar, Bah, C, Can, ETx1, F, FNA26, G, GW1, Il, Meso6, Mo1, NcTx, NE, NS, NY, RAB, Tx, WH3, WI, Rosatti (1987a); = n/a — Pa, Tat; = Piaropus crassipes (Mart.) Raf. — S, S13, Haines (2020b); = Pontederia crassipes Mart. — K4, POWO, Pellegrini, Horn, & Almeida (2018). Basionym: Pontederia crassipes Mart. 1823

Links to other floras: = Eichhornia crassipes - FNA26

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Wetland Indicator Status:

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

Heliophily ⓘ: 8