• Double O Arch


    National Park Utah

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Tumbling Mustard (Jim Hill Mustard)

Sisymbrium altissimum

Sisymbrium altissimum

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

Annual herbs from taproots; stems 9.8” to 3.3' (2.5 to 10 dm) tall or more

Leaves: alternate, or basal and still alternate; most simple; lobed to entire, the lower ones usually pinnatifid; 0.4” to 8” (1 to 20 cm) long or more

Flowers: 4 yellow petals in the shape of a cross or crucifer; yellow petals 0.25” to 0.34” (6.3 to 8.5 mm) long, fading to white; 4 sepals; 6 stamens (with 2 outer shorter than the inner 4); 1 pistil; nectar glands commonly 4

Pollinators: insects; some self-fertile

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

Blooms in Arches National Park: March, April, May, June

Habitat in Arches National Park: disturbed areas

Location seen: widespread, Visitor Center area, park road mile 0 to 2.5, Windows, Fiery Furnace parking lot

Other: The genus name, “Sisymbrium”, is an ancient Greek name for various plants of the mustard family. The species name, “altissimum”, means “tallest or highest”.

This is a non-native plant.

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?

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.