Flat-top Goldenrod Posted on July 28, 2012 by Axie Growing at water’s edge at Longfellow and at the Needham Town Forest. Blooms late summer through fall. Aster Family. Native. Flat-top Goldenrod, Grass-leaved Goldenrod (Euthamia graminifolia) Share this: Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Print (Opens in new window) Print Share on Pinterest (Opens in new window) Pinterest