Prunus triloba ‘Multiplex’ (double flowering plum)

Just in case you're wondering what all those gorgeous shrubs that look like exploding pink candy floss right now are, they're double-flowering plum.  Every year at this time I covet them but they are rather boring the rest of the year, so I shall resist.  They don't produce fruit, by the way.

I snapped this picture of somebody else's plum on my walk to work.