Iris versicolor

Iris versicolor

Blue Flag, Harlequin Blueflag, Larger Blueflag, Northern Blue Flag

Centaurea americana

Centaurea americana

American Basketflower, American Star-thistle, American Starthistle, Basket Flower, Basket-flower, Shaving Brush, Sweet Sultan

Baptisia australis

Baptisia australis

Blue False Indigo, Blue Wild Indigo, Horse Fly Weed, Indigo Weed, Rattlebush, Rattleweed

Verbena hastata

Verbena hastata

American Vervain, Blue Vervain, False Vervain, Indian Hyssop, Swamp Verbena, Swamp Vervain, Vervain, Wild Hyssop

Agastache foeniculum

Agastache foeniculum

Anise Hyssop, Blue Giant Hyssop, Lavender Hyssop

Centaurea montana

Centaurea montana Mountain Blue

'Mountain Blue'

Mountain Bluet, Perennial Cornflower

Clematis crispa

Clematis crispa

Blue Jasmine, Blue Jessamine, Curled Virgin's Bower, Curlflower, Curly Clematis, Marsh Clematis, Swamp Leather Flower, Swamp Leatherflower

Iris missouriensis

Iris missouriensis

Rocky Mountain Iris, Western Blue Flag, Wild Blue Iris

Lupinus polyphyllus

Lupinus polyphyllus

Big-leaved Lupine, Bigleaf Lupine, Blue Bonnet, Blue-pod Lupine, Bog Lupine, Common Lupine , Garden Lupine, Large-leaved Lupine, Lupin, Meadow Lupine

Viola sororia

Viola sororia

Butterfly Violet, Common Blue Violet

Aconitum napellus

Aconitum napellus

Monk's Hood, Monk's-hood , Venus' Chariot

Aquilegia caerulea

Aquilegia caerulea

Colorado Blue Columbine, Colorado Columbine, Rocky Mountain Columbine

Cichorium intybus

Cichorium intybus

Chicory

Eryngium planum

Eryngium planum

Blue Eryngo, Flat Sea Holly, Flat-leaved Eryngium

Lilium superbum

Lilium superbum

Swamp Lily, Turk's Cap Lily, Turk's-cap Lily

Senna hebecarpa

Senna hebecarpa

American Senna