I snapped a few more pictures of the patch of mystery-could-be-anemones down by the compost heap earlier this afternoon. It looks like the plants are getting ready to flower.
Next to the maybe-anemone patch, I also spotted a few of the lovely violas that have been gently rampaging around the front yards (such as they are) in the neighbourhood. My landlord will inevitably mow them down, and I would dearly love to see them next spring in my big cedar planters. What's the best way to move one or two of them upstairs? Alternately, what do the mature seed heads look like?