It has bright rose to purple urn like flowers. Taper-tip onion grows on rocky outcrops and dry prairies with annuals such as blue-eyed Mary and rusty popcorn flower. Key nectar species for Fenders Blue Butterfly.
Willow dock is native to many moist habitats throughout the west. Its habitat value in our native western Oregon prairies is not as a pollinator plant (it is wind-pollinated) but as a larval host-plant for butterflies such as the rare Great Copper. Restoration efforts are underway in the Willamette Valley to restore populations by providing both the nectar source, Grindelia integrifolia (gumweed), and the host-plant willow dock.