Sagittaria rigida Pursh. clade: Graminea Group, Platyphylla Complex. Sessile-fruited Arrowhead, Stiff Arrowhead. Phen: Jul-Oct. Hab: Natural mountain ponds, wet meadows. Dist: ME and MN, south to w. VA, nc. TN, MO, nw. AR, and NE.

Origin/Endemic status: Native

Synonymy: = AqW, Ar, C, F, FNA22, G, GrPl, Il, K1, K3, K4, Mi, Mo1, NE, NY, Pa, S, S13, Tat, Va, W, WV, Bogin (1955), Keener (2005), Wooten (1973)

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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