• Double O Arch

    Arches

    National Park Utah

Hopi Blanketflower (Reddome Blanketflower)

Gaillardia pinnatifida

Gaillardia pinnatifida

Family: Asteraceae (A Utah Flora – Compositae) – Sunflower Family

Perennial (less commonly biennial or annual) herbs; stems 3.2” to 1.8' (8 to 55 cm) tall

Leaves: alternate or mainly basal; simple; entire to pinnatifid, usually lobed; glandular; has hairs; 0.4” to 3” (1 to 7.5 cm) long, 0.08” to 0.6” (2 to 15 mm) wide

Flowers: ray flowers and disk flowers; flower head appears to be a single flower, but is composed of several flowers (a composite). Solitary flower heads on long stems; 7 to 12 yellow ray flowers 3-lobed, lobes are 0.08” to 0.2” (2 to 5 mm) long; purple disk flowers, perfect, fertile, 0.6” to 1.4” (15 to 35 mm) wide

Pollinators: other genera in this family are pollinated by insects

Fruits: achene – 1 seeded with hard shell

Blooms in Arches National Park: April, May, June, July, August, September, October

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

Location seen: park entrance, Delicate Arch road, park road mile 12 to 13, outside Arches National Park on Hwy. 128 around Big Bend campground

Other: The genus name, “Gaillardia”, honors M. Gaillard de Charentoreau, an 18th century French Magistrate and patron of botany. The species name, “pinnatifida”, means “pinnately cut” referring to the leaves.

This family is the most advanced and complex of the dicots. The family is rich in oils and resins and is found in every part of the world, but is infrequent in the tropical rainforest. Aquatic or semi-aquatic species are also uncommon.

Did You Know?

Landscape Arch

Landscape Arch is the longest arch in Arches National Park, measuring 306 feet from base to base. In 1991, a massive slab of rock fell from its underside, resulting in an even thinner ribbon of rock.