Nelumbo nucifera

Nelumbo nucifera

Sacred Lotus

Iris versicolor

Iris versicolor

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

Crotalaria pallida

Crotalaria pallida

Smooth Crotalaria, Smooth Rattlebox

Centaurea americana

Centaurea americana

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

Iris pseudacorus

Iris pseudacorus

Pale Yellow Iris, Yellow Flag

Nigella damascena

Nigella damascena

Devil In The Bush, Love - In - A - Mist

Baptisia australis

Baptisia australis

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

Ipomoea tricolor

Ipomoea tricolor Heavenly Blue

'Heavenly Blue'

Heavenly Blue Morning Glory

Lobelia siphilitica

Lobelia siphilitica

Blue Cardinal Flower, Great Blue Lobelia

Verbena hastata

Verbena hastata

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

Carlina acaulis

Carlina acaulis Simplex

var. Simplex

Smooth Carlina

Agastache foeniculum

Agastache foeniculum

Anise Hyssop, Blue Giant Hyssop, Lavender Hyssop

Ageratum houstonianum

Ageratum houstonianum dwarf Blue Mink

'Blue Mink'

Flossflower, Garden Ageratum

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

Hosta ventricosa

Hosta ventricosa

Blue Hosta, Blue Plantain Lily, Hosta

Iris missouriensis

Iris missouriensis

Rocky Mountain Iris, Western Blue Flag, Wild Blue Iris

Liriope muscari

Liriope muscari db

Big Blue Lilyturf, Lilyturf

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

Panax quinquefolius

Panax quinquefolius

American Ginseng, Huaquishen

Teucrium canadense

Teucrium canadense

American Wood Sage, Canada Germander, Germander

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

Iris magnifica

Iris magnifica f. caerulea

var. f. caerulea

Blue Juno Iris

Knautia arvensis

Knautia arvensis

Blue Buttons, Field Scabiosa, Field Scabious

Lobelia siphilitica

Lobelia siphilitica Alba

var. Alba

Great White Blue Lobelia, White Cardinal Flower, White Lobelia

Glycyrrhiza lepidota

Glycyrrhiza lepidota

American Licorice, Wild Licorice

Lilium superbum

Lilium superbum

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

Parthenium integrifolium

Parthenium integrifolium

Wild Quinine

Senna hebecarpa

Senna hebecarpa

American Senna