Casual Taxa - Have Not Been Observed To Reproduce Unaided And Including Those Classed As Either Casual Or Casual And Persisting [This Species Has] Rarely Been Recorded Growing From Spilt, Imported Chicken-Feed, But Have Not Been Observed To Reproduce. (Creation of a Risk Assessment Protocol for Cultivated Species in the Falkland Islands and Volunteer invasive plant recording sheet (Unknown).); Built up areas and gardens. c. 11 m. Very rare. Recorded once on Pebble Island and probably locally extirpated (R. Lewis 2012). Casual. All plants controlled (R. Lewis 2012). Not cultivated. (Upson R. & Lewis R. (2014). Updated atlas and checklist. Report to Falklands Conservation. 225 pp.); Limited, very rare. Recorded to the west of the island. Possibly extirpated. ([Heller, 2019] Falklands Conservation Flora and Fauna List (Unknown));
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Invasive. (Department of Agriculture, 2019. Biosecurity Workshops Report. Department of Agriculture);
A Eurasian Wide-temperate species extensively naturalised in N. America so that its distribution is now Circumpolar Wide-temperate. (Upson R. & Lewis R. (2014). Updated atlas and checklist. Report to Falklands Conservation. 225 pp.)
Blake D., Stanworth A., Wong L, Pagad S. (2020). Global Register of Introduced and Invasive Species of Falkland Islands (Islas Malvinas). Version 1.2. Invasive Species Specialist Group ISSG.; Department of Agriculture (2014). Biosecurity Workshops Report. Department of Agriculture.pdf; Creation of a Risk Assessment Protocol for Cultivated Species in the Falkland Islands and Volunteer invasive plant recording sheet (Unknown).; Department of Agriculture, 2019. Biosecurity Workshops Report. Department of Agriculture; Upson R. & Lewis R. (2014). Updated atlas and checklist. Report to Falklands Conservation. 225 pp.; ([Heller, 2019] Falklands Conservation Flora and Fauna List (Unknown))