Does anyone know the common or botanical name of a perennial that I planted several years ago but can't remember the name of? I thought it was 'turtlehead plant' as a common name, but in searching the Hortiplex Database, they come up with zero. It's about three feet tall, has a very upright habit and pink blooms the shape of a turtle's head in late summer. When the blooms die off, it's seeds remain on the stem about six inches down. Bees love it. It is not invasive but does spread via roots or rhizomes or something. I'm in the Chicagoland area.

Thank you (anyone!) for any help or suggestions.

Westy1941