Photo of glade coneflower flowerhead showing yellow pollen

    Glade Coneflower

    Echinacea simulata
    Photo of pale purple coneflower showing white pollen among disk florets

    Pale Purple Coneflower

    Echinacea pallida
    No photo available

    Philadelphia Fleabane

    Erigeron philadelphicus
    spotted knapweed

    Spotted Knapweed

    Centaurea stoebe
    invasive icon

    Invasive

    Photo of cut-leaved teasel showing flowerhead and joined, cuplike leaves.

    Teasels

    Dipsacus fullonum and D. laciniatus
    invasive icon

    Invasive