• Double O Arch

    Arches

    National Park Utah

There are park alerts in effect.
show Alerts »
  • Delicate Arch Viewpoint Inaccessible

    Wolfe Ranch and the hiking trail to Delicate Arch are open, but flood waters and mud have blocked the road to Delicate Arch Viewpoint.

  • Safety in Bear Country

    Black bears have been seen near Devils Garden Campground. Don't lure or feed them. Dispose of trash in designated receptacles; don't leave it in bags or other soft containers. Store food in vehicles or hard containers when not being prepared or consumed. More »

Canaigre (Dock; Wild Rhubarb; Sorrel)

Rumex hymenosepalus

Rumex hymenosepalus

Family: Polygonaceae – Buckwheat Family

Perennial herbs from tuberous roots; 8” to 3.3' (2 to 10 dm) tall

Leaves: alternate; simple; 3.2” to 10” (8 to 25 cm) long, 0.8” to 4.8” (2 to 12 cm) wide

Flowers: 0 petals; 6 petaloid or sepaloid sepals, rarely 4 (the 3 inner segments form papery wings surrounding the fruit); stamens usually 6; 1 pistil; small flowers in clusters usually greenish to pinkish; flower cluster 4” to 16” (10 to 40 cm) long

Pollinators: wind

Fruits: achene

Blooms in Arches National Park: March, April, May

Habitat in Arches National Park: desert shrub communities

Location seen: widespread along park road, across from Park Avenue parking lot, Fiery Furnace parking lot

Other: The genus name, “Rumex”, is the ancient Latin name for docks and sorrel plants. The species name, “hymenosepalus”, means “membranous sepals” and refers to the 3 inner segments that become papery when the plant is in fruit.

This family's scientific name, “Polygonaceae”, is derived from the Greek words “poly” which means "many" and “goni” which means "joint", a reference to many species that have swollen nodes or joints.

Did You Know?

Pine Tree Arch

There are over 2,000 cataloged arches in Arches National Park. In order to be considered an arch, an opening must measure at least three feet (in any direction).