• Double O Arch


    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 »

Pallid Milkweed

Asclepias cryptoceras

Asclepias cryptoceras

Family: Asclepiadaceae - Milkweed Family

Perennial herbs; 3.9” to 1' (1 to 3 dm) tall

Leaves: opposite; simple; broad leaves 0.8” to 4.6” (2 to 11.5 cm) long, 0.6” to 4.4” (1.5 to 11 cm) wide; no hairs

Flowers: large greenish-yellow umbellate flowers; petals curled backward; 5 petals; rose colored 5 lobed crown (corona) present between the corolla and the stamens; lobes 0.4” to 0.6” (10 to 15 mm) long; flowers perfect; 5 sepals; 5 stamens; 2 carpels

Pollinators: other species of Asclepias are pollinated by insects (specifically bees, moths and butterflies)

Fruits: 2 follicles

Blooms in Arches National Park: April, May

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

Location seen: Delicate Arch Viewpoint trail

Other: The genus name, “Asclepias”, refers to “Asklepios”, a Greek physician and an authority on the medicinal use of plants and who according to Greek Myth could bring the dead to life. Hades fearing a loss of employment, convinced his brother Zeus to kill Asklepios with a bolt of lightning. The species name, “cryptoceras”, is from “cryptos” which means "hidden" and “keras” which means "horn or antlers".

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.