Sagittaria rigida Pursh

Washington: Snohomish: Crescent Lake 3.5 miles SSW of Monroe, at WDFW access area on southeast end of lake.
47.80889° N, 122° W,
Shallow lake in old river oxbow; Muddy receeding shoreline, with Nuphar polysepala, Alisma triviale, Sparganium emersu, and Sagitarria rigida. Abundant in soft mud of lake shallow where submerged earlier in year. HerbariumSpecimenDuplicate: Sagittaria rigida Petals white; Pistillate flowers sessile; Leaves variable, from nearly linear on outer or more submerged leaves to broadly ovate with or without lobes at base on inner and more emergent leaves; Petioles triangular in cross-section, stolons present. [WTU Database #84188]. Datum: WGS 84. Https://intermountainbiota.org/portal/collections/individual/index.php?occid=30880297. Phenology: vegetative.

Ben Legler 3005, 2005-8-25
WS, Catalog: 372805