Ajuga chamaepitys subsp. glareosa. I thought this might be A. bombycina, but I guess that's much woolier.
It doesn't know when to stop blooming.
What a superb plant!
The only mildly interesting Ajuga I have is Ajuga lupulina... not near so desirable as the one you show, and quite a bit larger, I think. It blooms here in mid-June through July - quite a long bloom but clearly not so long-blooming as A. chamaepitys.
Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm
That's a pretty nice one, though.
Ajuga chamaepitys has a subspecies, chia, which I hear is kind of a weed. This is a biennial or short-lived perennial; seeds here and there. Came from Rocky Mtn. Rare Plants a long time ago.
p.s. I noticed from looking at my blog that this has been in bloom the first week of December, never mind frost.
extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C
That certainly would be one of those stumpers, Bob. I never would have guessed ajuga! A wonderful plant.
Do you mean the subspecies chia is a biennial "weed", or the whole species?
Rick Rodich zone 4a. Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA
I've heard that subsp. chia seeds all over the place; I've never grown it.
Here's another picture of subsp. glareosa, closer up, taken on the first of December, when it was still in flower (flowers not visible).