• Double O Arch

    Arches

    National Park Utah

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  • 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 »

Rydberg's Twinpod (Pointleaf Twinpod)

Physaria acutifolia

Physaria acutifolia

Family: Brassicaceae (A Utah Flora - Cruciferae) – Mustard Family

Perennial herbs; stems 1.2” to 9.8” (0.3 to 2.5 dm) long

Leaves: basal and alternate; simple; blue-green rounded spatula-shaped leaves; leaves reduced upwards; entire to toothed; basal leaves 0.68" to 3.8” (1.7 to 9.5 cm) long, 0.24" to 1.8” (0.6 to 4.5 cm) wide

Flowers: 4 yellow petals in the shape of a cross or crucifer; 4 sepals; 6 stamens; 1 pistil; flowers 0.3" to 0.5” (7.5 to 12.5 mm) long; nectar glands commonly 4

Pollinators: other genera in this family are pollinated by insects (specifically butterflies, moths, bees and flies); some self-fertile

Fruits: bladdery-inflated silique - a pod with 2 compartments with a thin partition

Blooms in Arches National Park: February, March, April

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

Location seen: park road mile 0 to 2.5, Park Avenue, Windows, upper Delicate Arch Viewpoint

Other: The genus name, “Physaria”, is from the Greek physa meaning “bladder” which refers to the inflated seedpods. The species name, “acutifolia”, means "with pointed leaves".

The common name, twinpod, refers to the seed's shape.

Many plants in this family are weeds and they flower early because they are annual. Many vegetables are in this family– radish, cabbage, cauliflower. A few species of plants in this family are poisonous to livestock.

Did You Know?

Close up of biological soil crust

The dirt is alive! A living crust called "Biological Soil Crust" covers much of Arches and the surrounding area. Composed of algae, lichens and bacteria, this crust provides a secure foundation for desert plants. Please stay on roads and trails to avoid trampling this important resource. More...