Heteranthera dubia (Jacquin) MacMillan. Common name: Water Stargrass. Phenology: (Apr-) Jul-Oct. Habitat: Streams, rivers, lakes, reservoirs, especially in areas with calcareous substrates. Distribution: QC west to WA, south to Cuba and Central America, but rare or absent in much of the se. United States. The attribution of this species to SC is in error (as by Kartesz 1999), based on a misidentified specimen (C. Horn, pers. comm.).

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, Can, ETx1, F, FNA26, GW1, K4, Mo1, NcTx, NE, NS, NY, Pa, POWO, RAB, S13, Tat, Tn, Va, W, WH3, WI, WV, Horn (2020); = Zosterella dubia (Jacq.) Small — C, G, Il, S; > Heteranthera dubia (Jacq.) MacMill. — Tx; > Heteranthera liebmannii (Buchenau ex Magnus) Shinners — Tx; Commelina dubia Jacquin. Basionym: Commelina dubia Jacq. 1768

Links to other floras: = Heteranthera dubia - FNA26

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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