Potamogeton richardsonii (Bennett) Rydberg. Richardson Pondweed. Phen: Jun-Aug (-Sep). Hab: Slow-moving, calcareous waters. Dist: NL (Labrador) west to AK, south to DE, MD, PA, n. OH, n. IN, n. IL, IA, NE, NM, AZ, and CA.
Origin/Endemic status: Native
Synonymy: = AqW, C, F, FNA22, G, GrPl, Il, K1, K3, K4, Mi, NE, NY, Tat, Wiegleb & Kaplan (1998); < Potamogeton perfoliatus L. – Pa
Wetland Indicator Status:
Heliophily: 8
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