Fox-and-cubs grows from between the stones by the bridge at Smithy Brook. Some years ago a few rosettes of it popped up at the top end of our lawn at the edge of the patio. Much as I like the flowers, we made efforts to weed them out because they can spread by stolons (creeping stems on the surface) and rhizomes (under ground storage stems) into turf where they are near-impossible to eradicate.