Heteranthera dubia (Jacquin) MacMillan. Water Stargrass. Phen: (Apr-) Jul-Oct. Hab: Streams, rivers, lakes, reservoirs, especially in areas with calcareous substrates. Dist: 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, ETx1, F, FNA26, GW1, K1, K3, K4, Mo1, NcTx, NE, NY, Pa, 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

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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