|Frost flowers on Skullcap|
"You may want to add Skullcap to your list of frost flower plants. A couple years ago the skullcap at the front door of the Nature Center had frost flowers 2 or 3 days in a row."
In addition to a source of nectar, S. incana serves as a host plant for a specific species of moth, Caloptilia scutellariella.
There are good pictures and plant descriptions at Missouriplants.com.