The photo's a little dark but they look a lot like the dried fruit of Cornus kousa.

Here is a link that might be useful: {{gwi:1093145}}

When mature plastered with flowerheads, therefore very popular - but often not completely happy with our summer drought. In addition to a moist soil it needs room to develop into a broad vase, 15'-35' tall and wide (bigger after many years) that cannot be whacked back without spoiling its beauty.

Thanks very much :)