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D x willdenowii (D pardalianches x D. plantagineum) in New Flora of the British Isles 2nd Ed. Demonstrating the range of basal leaf shape and intermediate features between the two species within this clump. Consistent among the features:
Short glandular hairs with a few long eglandular hairs. Mainly obtuse basal leaves mostly rounded-truncate (sometimes slightly cuneate) at base and most often obscurely crenate-dentate (though there is a range of phenotypic expression within this population). Locally common and naturalized within riparian forest in shady understory along both sides of Cedar River from Maple Valley down to Renton. Alnus rubra overstory, growing with Rubus bifrons, Alliaria petiolata, Hesperis matronalis, Ranunculus repens. See linked observation:
https://www.inaturalist.org/observations/159776350

Determined with @echaley

WA Flora Checklist:
https://burkeherbarium.org/waflora/checklist.php?Taxon=Doronicum%20willdenowii