Flixweed (Bedground-weed; Tansy-mustard)
Synonym: Sisymbrium sophia
Family: Brassicaceae (A Utah Flora – Cruciferae) – Mustard Family
Annual or infrequently winter annual; stems 6.7” to 3.3' (1.7 to 10 dm) tall or more
Leaves: basal and alternate; lower compound to simple (pinnatifid), the upper smaller and compound or simple (pinnatifid); 0.4” to 4.8” (1 to 12 cm) long
Flowers: 4 cream to yellow petals in the shape of a cross or crucifer; petals 0.088” to 0.12” (2.2 to 3 mm) long; 4 yellowish deciduous sepals; 6 stamens; 1 pistil; nectar glands commonly 4' flowers in corymbs or racemes
Pollinators: other genera in this family are pollinated by insects (butterflies, moths, bees and flies); self-fertile
Fruits: silique - a pod with 2 compartments with a thin partition
Blooms in Arches National Park: April, May
Habitat in Arches National Park: disturbed areas, desert shrub and pinyon-juniper communities
Location seen: park road
Other: The genus name, “Descurainia”, honors Francois Descourain (1658-1740), a French botanist and physician/pharmacist. The species name,”sophia”, is from the Greek word meaning “wisdom”.
This is a non-native plant from Europe.
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?
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...