Goldenrod, Grassleaf
Euthamia graminifolia, also known as Goldentop or Grassleaf Goldenrod, is a native wildflower native to Michigan and the Upper Peninsula. It is not a member of the goldenrod family, though it has a similar bloom time. It prefers medium wet soils and full sun, under which conditions it is an enthusiastic spreader by rhizome. However, it can tolerate wet to medium dry soil and partial shade, and is more restrained when conditions are not perfect, especially in the competitive environment of a native meadow planting.
Narrow leaves and flat-topped clusters of tiny, shiny yellow flowers help differentiate this plant from a true goldenrod, and also make it popular with a more diverse set of pollinators. The seeds are eaten by finches and sparrows.
It blooms mid-summer through fall and can reach a height of 4 feet in ideal conditions. In average soil in the UP, a height of 2 feet is more typical.