Echinops bannaticus ‘Blue Glow’ (globe thistle ‘Blue Glow’)

Echinops ritro ‘Veitch’s Blue’ (globe thistle ‘Veitch’s Blue’)

Epimedium grandiflorum ‘Yubae’ (bishop’s hat ‘Yubae’)

Epimedium x versicolor ‘Sulphureum’ (bishop’s hat ‘Sulphureum’)

Eragrostis spectabilis (purple lovegrass)

Eryngium yuccifolium (rattlesnake master)

Erythronium americanum (yellow trout lily)

Eurybia macrophylla ‘Twilight’ (big-leaf aster ‘Twilight’)

Eutrochium maculatum ‘Gateway’ (Joe Pye weed ‘Gateway’)

Filipendula rubra (queen of the prairie)