Marrubium vulgare

Marrubium vulgare_white horehound_ JM Di Tomaso
Photo courtesy Joseph DiTomaso

Common names: horehound; white horehound

Marrubium vulgare (white horehound) is a perennial shrub/forb/herb (family Lamiaceae). This plant is found heavily populating disturbed places throughout California in grasslands scrub and riparian areas. It has mostly minor impact on native species.

Cal-IPC Rating: Limited

Cal-IPC Assessment

Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Weed RIC Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

Cal-IPC Symposium Presentations

  • None for this species.

Other Marrubium vulgare Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - See the distribution of this species on Calflora's map of California.
  • CalWeedMapper - Distribution information with ability to determine regional priorities.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.