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

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

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