Thanks, Arisaema. That looks like it.
Potentilla vs. Fragaria: The obvious one, of course, is that Fragaria has berries. Not sure if there is one characteristic which separates Potentilla and Fragaria early in the season? Most Fragaria have runners, hairy under the leaves etc. Anyone else have a diagnostic feature?
...and, yes, I did notice that my Potentilla has hairy undersides to the leaves!