Marrubium vulgare

Marrubium vulgare_white horehound_ JM Di Tomaso
Photo: 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?

CDFA Rating: None?


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 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

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Marrubium vulgare Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Marrubium vulgare_inflorescence_copyright2014_NealKramer
    Marrubium vulgare (horehound) inflorescence. Photo: &#169 2014 Neal Kramer
    Marrubium vulgare_leaves_copyright2010_NealKramer
    Marrubium vulgare (horehound) leaves. Photo: &#169 2010 Neal Kramer
    Marrubium vulgare_seedling_copyright2014_NealKramer
    Marrubium vulgare (horehound) seedling. Photo: &#169 2014 Neal Kramer