Limnobium spongia (Bosc) L.C. Richard ex Steudel. Common name: American Frog's-bit, Spongeplant. Phenology: Jun-Sep. Habitat: Swamps, marshes, ponds, pools. Distribution: DE and MD south to s. FL, west to e. TX, north in the interior in the Mississippi Embayment to s. MO and s. IL; disjunct around the Great Lakes (as in n. IN and w. NY). Reports of L. spongia as also in tropical America are based on misapplication of the name to plants that are actually L. laevigatum (Humboldt & Bonpland ex Willdenow) Heine.
Origin/Endemic status: Endemic
Synonymy ⓘ: = AqW, Ar, C, ETx1, F, FNA22, G, GW1, Il, K4, NE, NY, RAB, S, S13, Tat, Tn, Tx, Va, WH3; = Hydrocharis spongia Bosc = Limnobium spongia (Bosc) Rich. ex Steud. ssp. spongia — Mo1. Basionym: Hydrocharis spongia Bosc 1807
Links to other floras: = Limnobium spongia - FNA22
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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 ⓘ: 7
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