One in Adelphi, Maryland, one in Wildwood, Florida, one at the US National Arboretum with a grandfatherly interest in many more around the DC area (unless noted, pictures are taken the day of post)
You've got to love the subtlety of these persistent calyces though subtlety isn't a quality I automatically associate with Salvias. The flowers, before they faded and fell, were deep maroon? This is prettier.