• South Window

    Arches

    National Park Utah

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  • Delicate Arch Viewpoint Road Closed

    Due to flash flooding in Winter Camp Wash, the Delicate Arch Viewpoint Road is currently inaccessible.

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Basin Daisy

Erigeron pulcherrimus

Erigeron pulcherrimus

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

Perennial herbs; stems 2” to 1.2' (5 to 35 centimeters) tall

Leaves: basal and alternate; simple; basal leaves 0.32” to 2.8” (0.8 to 7 cm) long; 0.04” to 0.2” (1 to 5 mm) wide; leaves reduced upwards; has hairs

Flowers: ray flowers and disk flowers; flower head appears to be a single flower, but is composed of several flowers (a composite). Flowers are white, pink, or violet; 25 to 60 rays; rays 0.32” to 0.6” (8 to 15 mm) long; flowers 0.08” to 0.148” (2 to 3.7 mm) wide

Pollinators: other Erigeron species are pollinated by bees, moths and butterflies

Fruits: achene – 1 seeded with hard shell

Blooms in Arches National Park: April, May, June

Habitat in Arches National Park: desert shrub and pinyon-juniper communities on saline and seleniferous clays, clay-silts, and gravel substrates

Location seen: Delicate Arch road

Other: The genus name, “Erigeron”, is from Greek “eri” meaning “early” and “geron” which means “old man” because the plant blooms early in the year and the seed's bristles resembles an old man's gray hair. The species name, “pulcherrimus”, means “beautiful”.

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?

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).