The Delicate Arch Viewpoint Road is closed. All other roads and trails remain open, but many trails are snowy, icy, and dangerous. Please inquire at the visitor center for the most up-to-date conditions.
Construction Update - 11/25/2013
Construction work continues at the Devils Garden parking lot, limiting parking and causing occasional delays. Visitors can avoid the area by turning around at Sand Dune Arch. More »
Family: Asclepiadaceae - Milkweed Family
Asclepias is the only genus from this family represented at Arches National Park. Perennial herbs usually with milky latex; stems 2' to 3.3' (6 to 10 dm) tall
Leaves: opposite; simple; hairy; 2.4” to 9.2” (6 to 23 cm) long, 1.2” to 5.6” (3 to 14 cm) wide
Flowers: flowers in clusters; bisexual; 5 united purplish-rose petals which or lobed or cleft and folded downward; 5 parted or lobed sepals folded downward; 5 stamens; 2 pistils; plus a corona (an additional structure sitting between the petals and the stamens that looks like an extra set of petals). The corona consists of 5 hoods; inside the hoods there may be a beak-like structure (horn) pointing toward the center of the flower. The petal lobes are 0.4” to 0.6” (10 to 15 mm) long
Pollinators: insects (specifically bees, moths and butterflies); self-fertile
Fruits: pair of follicles; seeds typically have very silky hairs
Blooms in Arches National Park: May, June
Habitat in Arches National Park: weed in disturbed areas and riparian areas
Location seen: park road south of Salt Valley overlook around mile 10 to11, outside Arches National Park in Mill Creek
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, “speciosa”, means “showy”.
Several species of Asclepias are poisonous to humans and livestock.
Did You Know?
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.