Small population behind Husvic station on gravel plain and historic Maiviken population. (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.); Persistent. No plants were found at the Maiviken or Karrakatta Valley sites; a small amount of follow up was required at the Husdal site where a few seedlings had germinated. A single plant was found next to the SÓ§rling Valley hut on Barff Peninsula, the first record of this species at this site. (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; 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;