Restricted naturalised. Follow-up was undertaken on all sites. In addition, twelve new sites, some with plants in flower, were found in Karrakatta Valley; there was a new patch in Hansen Valley and another at a site in Husdal, the latter being the first record for the species in this weed unit. (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); Historic population at Grytviken site this season. Populations at Husvic sites and Grass Island. (Floyd, K. (2013) Weeds on South Georgia. Government of South Georgia and the South Sandwich Islands.); A decision is needed to determine whether it is introduced or native. (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.);
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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; 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; Floyd, K. (2013) Weeds on South Georgia. Government of South Georgia and the South Sandwich 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.;