The Grytviken site had some small adult plants controlled and a Historic record for Husvik was not found in 2013. (Floyd, K. (2013) Weeds on South Georgia. Government of South Georgia and the South Sandwich Islands.); Several flowering plants were found and sprayed on the northern side of Nybrakke at Grytviken this season. (Government of South Georgia and the South Sandwich Islands (2015) Alien plants on South Georgia: Season Report 2014-2015. Government of South Georgia and the South Sandwich Islands.); Persistent. The single site of this species is on the northern side of Nybrakka at Grytviken. (Floyd, K. (2018) Non-native plants on South Georgia: Season Report 2017/18. Indigena Biosecurity International, Government of South Georgia and the South Sandwich Islands);
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Terrestrial
James, R., Floyd, K., Pagad, S. & Wong, L.J. (2020) Global Register of Introduced and Invasive Species of South Georgia and the South Sandwich Islands. Version 1.4. Invasive Species Specialist Group ISSG. Checklist dataset; Greene, S.W. & Walton, D.W.H. (1975). An annotated checklist of the sub-Antarctic and Antarctic vascular flora, Polar Record, 17(110), pp. 473, 484.; Floyd, K. (2013) Weeds on South Georgia. Government of South Georgia and the South Sandwich Islands.;Government of South Georgia & the South Sandwich Islands (2016) South Georgia Non-Native Plant Management Strategy 2016-2020. Government House, Stanley, Falkland Islands.; Government of South Georgia and the South Sandwich Islands (2015) Alien plants on South Georgia: Season Report 2014-2015. Government of South Georgia and the South Sandwich Islands.; Floyd, K. (2018) Non-native plants on South Georgia: Season Report 2017/18. Indigena Biosecurity International, Government of South Georgia and the South Sandwich Islands;