Indian plum, Oemleria cerasiformis.
But the first flowering shrub is Indian Plum. For a week or so, when nothing else has leafed out, its pale green leaves and tiny flowers seem to float in the otherwise dark, damp forest. A description of the flowers' scent, From Pojar & MacKinnon: "unusual fragrance (something between watermelon rind and cat urine)."
Finally, a sign of hope, shown as found, a message to those thrown back into the snow and cold.
The future's so bright...