dyer's woad
California bluebell
shamrock pea
bluebottle
Erigeron acer
Roman nettle
blue fleabane
cornflower
Penstemon davidsonii
Davidson's penstemon
Collinsia verna
Centaurea cyanus
Urtica pipulifera
hound's-tongue
Phacelia campanularia
blue-eyed Mary
bachelor's button
Cynoglossum virginaticum
Parochetus communis
Agapanthus africanus
African tulip
African lily
alkali grass
large yellow lady's slipper
succory
chicory
Zigadenus elegans
Cichorium intybus
Cypripedium calceolus pubescens
blue African lily
chicory plant
dog mercury
Fritillaria mutica
common ageratum
Mercurialis perennis
blue devil
mission bells
viper's bugloss
blue thistle
rice-grain fritillary
common grape hyacinth
Ageratum houstonianum
dog's mercury
delphinium
Fritillaria affinis
Muscari neglectum
blueweed
Fritillaria lanceolata
Echium vulgare