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?
The catastrophic Bonneville Flood thundered through the Hagerman Valley 15,000 years ago leaving behind enormous fields of rounded lava boulders – some as big as cars. They are called ‘melon gravel’ and can still be seen throughout the valley today.