Goat's Beard, or Wild Spirea, is an enormous and showy native Alaskan perennial that can grow up to six' and looks like a bush. The large compound leaves are deep green and have serrated edges. In early autumn, the plants come into bloom, producing many dramatic plumes composed of tiny, white flowers. The plants are prized for bringing color to the garden after most other flowers have already bloomed. Blooming Time: July.