Weeds Identification Gallery

Foxtail Barley

  • Hordeum jubatum
  • Grass Family: Poaceae
Updated: 09/2025

Foxtail barley is a widely distributed native cool season perennial or annual grass that is found throughout California up to an elevation of 9800 feet (3000 m). It is occasionally weedy on agricultural land and other disturbed, often moist places. Foxtail barley is susceptible to the same fungal pathogens that cause black stem rust of grains and wheat rust.

Habitat

Fields, pastures, ditchbanks, roadsides, saline and alkaline areas, and other disturbed, often moist sites.

Seedling showing long, narrow, thin leaves, 1/3X; . Credit: Jack Kelly Clark, UC IPM
Seedling. Credit: Jack Kelly Clark, UC IPM
Seed thrown by orchard mower puncturing a walnut leaf; Credit: Jack Kelly Clark, UC IPM
Seed. Credit: Jack Kelly Clark, UC IPM

Collar Region

Ligules are membranous, and unlike hare barley, auricles are absent or are poorly developed.

Green collar region with one leaf. Copyright information is at the bottom (Copyright 2007 The Regents of the University of California. All rights reserved.). Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources
Collar and sheath. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources

Mature Plant

The mature plant can reach almost 2 feet (60 cm) tall. Leaf blades are 1 to 6 inches (2.5–15 cm) long.

Mature plant (or may be several plants growing close together) growing in soil where other plants can be seen in the background. Copyright information is at the bottom (Copyright 2007 The Regents of the University of California. All rights reserved.). Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources
Mature plants. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources

Flowers

The flowering head is a spike that ranges from 1-1/5 to 4 inches (3–10 cm) in length. Long needlelike awns, up to 1/3 of an inch (7 mm), extend from the spike, earning the plant some of its common names such as "skunktail" and squirreltail".

Bristly spike of long, needle-like awns on green grassy weeds. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources
Flower head. Credit: Joseph M. DiTomaso, UC Agriculture and Natural Resources

More Information