African Oxygen Weed

African Oxygen Weed

(Lagarosiphon major)
*Not established in Michigan*
PROHIBITED IN MICHIGAN

Report this species:

 

Use the Midwest Invasive Species Information Network (MISIN) online reporting tool 

- Or - download the MISIN smartphone app and report from your phone - http://www.misin.msu.edu/tools/apps/#home

 

Identification:

  • Submerged aquatic plant
  • Dark green, alternating leaves curl downward
  • Form dense mats up to 3 feet thick
  • Stems grow up to 20 feet long with ‘j’ shaped curve

african oxygen weed
Rohan Wells NIWA Bugwood.org

african oxygen weed
Robert Videki Doronicum Kft Bugwood.org

Habitat: African oxygen weed inhabits freshwater lakes and slow flowing rivers. Cool water and abundant light are preferred.

Native Range: South Africa

Local Concern: Dense mats of African oxygen weed impede other aquatic organisms by decreasing oxygen levels, increasing pH levels, decreasing sunlight penetration, increasing decomposition of dead plants, and reducing biodiversity. Recreation is also extremely limited in infested areas.

Potential Means of Introduction: Escape from aquarium and water garden industry, spread by water current or boats.

MORE INFORMATION:

African Oxygen Weed Invasive Species Alert - Printable PDF

MDARD Weed Risk Assessment for African Oxygen Weed (Lagarosiphon major) - This document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to cause harm.