• Double O Arch

    Arches

    National Park Utah

There are park alerts in effect.
hide Alerts »
  • Extreme Fire Danger

    Due to extremely dry conditions, fire restrictions are in effect in all national park units in Southeast Utah. More »

Bush Encelia (Brittlebush)

Encelia frutescens

Encelia frutescens var. frutescens

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

Shrubs; 11.8” to 4.9' (3 to 15 dm) tall

Leaves: alternate; simple; entire or toothed; has hairs; 0.2” to 1” (0.5 to 2.5 cm) long

Flowers: flower head appears to be a single flower, but is composed of several flowers (a composite). Disk flowers orange to orange-yellow, 0.4” to 1.2” (1 to 3 cm) wide; rays lacking or 1-16 or more, yellow, 0.08” to 0.48” (2 to 12 mm) long

Pollinators: other Encelia species are pollinated by insects

Fruits: achene – 1 seeded with hard shell

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

Habitat in Arches National Park: desert shrub communities in dry open areas

Location seen: park road mile 0 to 2.5, West boundary of park

Other: The genus name, “Encelia”, honors Christopher Encel, a 16th century German botanist and a writer on oak-galls in 1577. The species name, “frutescens”, means “becoming shrubby”. This species is aromatic.

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?

Collared Lizard

Lizards, including the colorful collared lizard, are one of the most frequently seen animals at Arches. When not chasing flies or basking in the sun, they are often seen doing what appears to be push-ups. This odd dance might enhance their stereoscopic vision, helping them see what's looking back at them.