Floodplain terrace (depositional bar) above this community is dominated by tall herbs. Behind levies on older alluvial terraces are hydric Picea rubens forests.;Riverscour prairie along reach of high elevation river upstream from known Marshalia grandiflora sites. Herbaceous community dominated by Euthamia graminifolia with high diversity of sun-loving, disturbance resistant herbs, including many exotics. Along river edge is a narrow zone dominated by Carex emoryi cf.. This community is subject to periodic flooding and probably by ice scour in winter.
Representativeness
Small patch high elevation river scour prairie, upstream from known sites for Marshalia grandiflora but similar habitat.