General: African Mustard (Strigosella africana) is a short, stiff-stemmed upright annual forb with many basal leaves and branched flowering stalks. All parts of the plant are stiff and covered with tiny, forked hairs. The basal leaves are elongate and covered with tiny bumps, and each bump has a hair. Upper leaves are reduced. The flowers are violet to pink with four petals. Fruits are linear and held up and away from the stem. The plant dies after it flowers, leaving open, upright stalks that promote wildfire.

African Mustard is an uncommon component of disturbed desert vegetation communities. Around Las Vegas, look for this species in town and in disturbed roadsides and open fields in the desert.

This is an invasive weed. If hikers and other visitors to the native habitats around Las Vegas see this species, please try to pull it out. If you have this species on your private property, please eradicate it.

Family: Mustard (Brassicaceae).

Other Names: Malcolmia africana.

Plant Form: Basal leaves with upright flower stalks, stiff.

Height: To about 18 inches.

Stems: Branched, hairs.

Leaves: Basal leaves are elongate and covered with hairs.

Flowers: Blooms during early spring. Flowers clustered at the top of the flower stalks, but the stalks continue to grow past the flower; petals 4, violet to pink. Fruits are erect, usually held away from the stem; to about 2-inches long.

Seeds: Tiny, many per plant.

Habitat: Roadsides, fields, disturbed sites.

Elevation: About 4,000 to 6,000 feet.

Distribution: Throughout the western US and southern Canada; native to the Mediterranean region.

Comments: Like Sahara Mustard, African Mustard is adapted to fire and increases the fuel load available for fires, thus contributing to the conversion of native desert vegetation to an open grassland.