Origanum vulgare

These plants were growing among the very tall grasses down at Bridlewood, on 12 September 2017. I couldn't get a decent photo, but am posting this one for the record and maybe someone will be able to ID it for me. I've never seen it before, so it may be an escapee from one of the nearby gardens?

Thank you, Andrey Zharkikh, for the ID and info - Origanum! Much appreciated.

That day, I just needed a short break from watching TV footage of all the devastation caused by Hurricanes Harvey and Irma in south-east U.S.. Decided to dash down to a wetland in SW Calgary, hoping to see a few birds. Half a dozen Coots and a Mallard were all I saw.