help IDing flowering mint

Question

a garden on a campus near my home has a very prolific mint growing throughout it. today I noticed it was flowering! I'm really curious to know what type it is because the flowers look quite dissimilar to most variety examples I can find; they almost look like little small pairs of deep purple orchids, rather than big rods of clustered pink or whitish blooms. The leaves are soft, textured, a little hairy, toothed edges, and smell like mint. they grow in pairs of two around the stem. The stem is green; there's no darker tinting anywhere on the plant. The plants are growing tall, around two feet or a bit more. They are growing in northwestern Ohio.

Answer 1

It's definitely a catmint, but which variety is the question. Given its height, it may be Walker's Low (and here) (the "Low" in the name refers to a place, not a height). It's listed at two feet high by two to three feet spread.