I first became aware of this stachys when Lauren Springer Ogden (before she appended the last of her three epithets actually) gave one of her dazzling talks, and showed a slide of this species she took at Beech Park, the great Shakleton garden in Ireland. I was amazed by a mint that looked like a little fog bank studded with outlandish flowers. Above you can see a dazzling mat of it at Kendrick Lake (back in the day)...
|Here it is again, alongside a rock and Penstemon linarioides|
|And here with Penstemon pinifolius 'Mersea Yellow'|
|And a closeup of the flowers|
Now if I can only find and photograph this in the wild!