Species: 

Hypericum perforatum

Common Name: 

common St. Johnswort

Systems Affected (standardized): 

rangeland, disturbed/waste areas

Regions(s) present (updated by AB): 

NE, NW

5563325-PPT.jpg
Impacts: 

Crowds out native species and forage on pasturelands; toxic to livestock. has been shown to cause hyper photosensitivity. Ecosystem change/ habitat alteration
Negatively impacts agriculture
Negatively impacts animal health
Negatively impacts aquaculture/fisheries

Source? likely to be reintroduced: 

The risk of H. perforatum being introduced to yet more temperate countries is clearly high, especially as its small seeds are easily hidden amongst other seed samples or in hay or straw taken from one country to another. In addition this species is also likely to be carried legally or illegally to other countries as a useful medicinal plant.

Info Blurb: 

Crowds out native species and forage on pasturelands. Is toxic to livestock. Its small seeds are easily hidden in hay or straw. Intentionally introduced as a medicinal plant.

Native Regions in OK: 

NONE

Current and past designations: 

BS, TX

Present in OK?

Present in Bordering States?

OK, TX, NM, CO, KS, MO, AR, LA

Has Legal Status in BS?

CO List C