dyer's woad
Isatis tinctoria
cup and saucer
Campanula medium
Canterbury bell
Vinca minor
myrtle
Serratula tinctoria
Ajuga reptans
sawwort
creeping bugle
Polemonium van-bruntiae
Greek valerian
charity
Jacob's ladder
Polemonium caeruleum
Polymonium caeruleum van-bruntiae
indigotin
indigo
anil
Veronica agrestis
Gentianopsis detonsa
Gentiana detonsa
field speedwell
Catananche caerulea
blue succory
cupid's dart
peacock-blue
bachelor's button
Centaurea cyanus
cornflower
tournsol
bluebottle
bee balm
beebalm
ague weed
agueweed
Lupinus perennis
Indian beet
Gentiana quinquefolia
Gentianella quinquefolia
Swainsona galegifolia
old-maid's bonnet
smooth darling pea
sweet balm
Melissa officinalis
wild lupine
Saxon green
stiff gentian
sundial lupine