Nelumbo nucifera

Nelumbo nucifera

Sacred Lotus

Iris versicolor

Iris versicolor

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

Poa pratensis

Poa pratensis

Kentucky Blue-grass , Kentucky Bluegrass, Smooth Meadow-Grass

Carlina acaulis

Carlina acaulis Simplex

var. Simplex

Smooth Carlina

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

Ageratum houstonianum

Ageratum houstonianum dwarf Blue Mink

'Blue Mink'

Blue Mink Ageratum, Blue Mink Flossflower, Bluemink

Verbena hastata

Verbena hastata

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

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

Glyceria grandis

Glyceria grandis

American Mannagrass, Reed Meadowgrass, Tall Manna Grass

Panax quinquefolius

Panax quinquefolius

American Ginseng, Huaquishen

Centaurea montana

Centaurea montana Mountain Blue

'Mountain Blue'

Mountain Bluet, Perennial Cornflower

Hosta ventricosa

Hosta ventricosa

Blue Hosta, Blue Plantain Lily, Hosta

Liriope muscari

Liriope muscari db

Big Blue Lilyturf, Lilyturf

Lupinus polyphyllus

Lupinus polyphyllus

Big-leaved Lupine, Bigleaf Lupine, Blue Bonnet, Blue-pod Lupine, Large-leaved Lupine

Viola sororia

Viola sororia

Butterfly Violet, Common Blue Violet

Lilium superbum

Lilium superbum

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

Senna hebecarpa

Senna hebecarpa

American Senna

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

Clematis columbiana

Clematis columbiana

Blue Clematis, Columbian Virgin's-bower, Rock Clematis

Eryngium planum

Eryngium planum

Blue Eryngo, Flat Sea Holly, Flat-leaved Eryngium

Festuca ovina

Festuca ovina glauca

var. glauca

Blue Fescue

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

Poa palustris

Poa palustris

Fowl Bluegrass, Swamp Meadow-grass