Hoary alyssum

(Berteroa incana)

  • 1 - 3' tall
  • Blooms June to October
  • Flowers white with four notched petals, clustered at stem tips
  • Leaves oval- to lance-shaped, alternate; stem leaves attached and point upward
  • Leaves, stems, sepals, and seed pods have tiny star-shaped hairs
  • Reproduces only by seed
  • Seeds can remain dormant and viable for several years in a persistent seed bank
  • Toxic to horses if forage is greater than 30% contaminated


Known Distribution

There are few occurrences of this species documented in Colorado. View the known North American Distribution Map. If you are aware of infestations that are not represented, please report your sighting. Register for an EDDMapS account, then select "Report Sightings". Please include photos with your submissions.