Riparian vegetation includes black cottonwood (Populus trichocarpa), bulrush (Scirpus spp.), and cattails (Typha spp.). Willows (Salix spp.) are most common in the vicinity of the dam and the falls to the north and south of the Monument.
The Monument is also important to microbiotic plants, usually forming a soil crust or found on aging brush or rocks. USGS-BRD botanists have indicated that the exclusion of grazing makes portions of the Monument significant as a botanical preserve.
Facilitating the conservation of
Did You Know?
Lake Bonneville overflowed its rim about 15,000 years ago in southeastern Idaho near the present day city of Pocatello. The Snake River cut down through the ancient flood plain sediments and deepened and widened the Hagerman valley.