• Double O Arch


    National Park Utah

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Fremont's Mahonia (Fremont's Barberry)

Mahonia fremontii

Mahonia fremontii

Family: Berberidaceae – Barberry Family

Evergreen shrubs. Mahonia is the only genus from this family represented at Arches National Park. This plant is 5' to 9.8' (15 to 30 dm) tall; the inner bark is yellow.

Leaves: alternate; pinnately compound; spiny-toothed bluish green thick evergreen leaves that look like holly leaves, but not related to holly; 3 to 9 leaflets; no hairs; 0.4” to 1.2” (1 to 3 cm) long, 0.24” to 1.2” (0.6 to 3 cm) wide

Flowers: 6 yellow petals (approximately 0.5 inch wide); 3 sepals closely subtended by 3 bracts or 6; 6 stamens; 1 pistil; fragrant

Pollinators: bees

Fruits: purplish or reddish berry, hollow

Blooms in Arches National Park: April, May

Habitat in Arches National Park: desert shrub and pinyon-juniper communities

Location seen: Fiery Furnace, outside Arches National Park in Negro Bill Canyon, outside Arches National Park on Portal trail

Other: The genus name, “Mahonia”, honors Benard McMahon (1755-1816), an American horticulturist. The species name, “fremontii”, honors explorer John Charles Fremont (1813-1890).

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).