Sagittaria calycina Engelmann. clade: Calycina Group. Hooded Arrowhead. Phen: May-Sep. Hab: Seasonally exposed shores and flats of ponds, pools, and impoundments. Dist: N. OH and MI west to SD and CO, south to sw. VA, c. TN, LA, TX, and Mexico; disjunct in CA. Scattered occurrences eastwards are difficult to interpret as to 'nativeness', being primarily or entirely in manmade wetlands, to which they may have arrived by a diversity of means. First reported for SC by Hill & Horn (1997).

Origin/Endemic status: Native

Synonymy: = C, GrPl, Il, K3, K4, Pa, RAB, Va, W; = Lophotocarpus calycinus (Engelm.) J.G.Sm. – F, S, WV; = n/a – Tat; = Sagittaria montevidensis Cham. & Schltdl. ssp. calycina (Engelm.) Bogin – AqW, Ar, ETx1, FNA22, G, GW1, Meso6, NcTx, Ok, Tx, Bogin (1955), Keener (2005); > Lophotocarpus calycinus (Engelm.) J.G.Sm. – S13; > Lophotocarpus depauperatus J.G.Sm. – S13; > Sagittaria calycina Engelm. var. calycina – K1, Mo1

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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: 9