As usual with this kind of post, I’m going to split these between the planted native flowers, and the flowers I found growing wild, which may or may not be native.
Planted Wildflowers
Blue Iris, Iris versicolor , Iridaceae
Tuckerman’s Sedge, Carex tuckermanii , Cyperaceae
Slender Club Bulrush, Schoenoplectus heterochaetus , Cyperaceae
Tussock Sedge, Carex stricta , Cyperaceae
Wild Calla, Calla palustris , Araceae
Tufted Yellow Loosestrife, Lysimachia thyrsiflora , Myrsinaceae
Purple-flowering Raspberry, Rubus odoratus , Rosaceae
Canada White Violet, Viola canadensis , Violaceae
Golden Alexanders, Zizia aurea , Apiaceae
Heartleaf Foamflower, Tiarella cordifolia , Saxifragaceae
Fragrant Water Lily, Nymphaea odorata , Nymphaeaceae
Bull Head Pond Lily, Nuphar variegata , Nymphaeaceae
Wild Plants
Creeping Buttercup, Ranunculus repens , Ranunculaceae
Groundsel, Senecio vulgari s, Asteraceae
Cow Parsley, Anthriscus sylvestris , Apiaceae
Black Medick, Medicago lupulina , Fabaceae
Common Fleabane, Erigeron philadelphicus , Asteraceae
Common Spikesedge, Eleocharis palustris , Cyperaceae
Creeping Yellow Cress, Rorippa sylvestris , Brassicaceae
Town Avens, Geum urbanum , Rosaceae
Ground Ivy, Glechoma hederacea , Lamiaceae
Cursed Crowfoot, Ranunculus sceleratus , Ranunculaceae
Bittersweet Nightshade, Solanum dulcamara , Solanaceae
Common Mallow, Malva neglecta , Malvaceae
Common Wood Sorrel, Oxalis stricta , Oxalidaceae
Tall Buttercup, Ranunculus acris , Ranunculaceae
Hedge Bedstraw, Galium mollugo , Rubiaceae