Naturalised. (Fosberg, F.R., Sachet, M.H. & Stoddart, D.R. (1983)Henderson Island (Southeastern Polynesia): summary of current knowledge, Atoll Research Bulletin, 272, pp. 147. Available at: https://doi.org/10.5479/si.00775630.272.1); Weed, it is difficult to determine whether certain are native or aboriginal introductions. (Waldren, S., Wesiler, M.I., Hather, J.G. & Morrow, D. (1999)The non-native vascular plants of Henderson Island, South Central Pacific Ocean, Atoll Research Bulletin, 463, pp. 114. Available at: https://doi.org/10.5479/si.00775630.463.1);
Hold Ctrl whilst dragging to view details of selected occurrences.
Invasive. (Christian, M., Warren, J., Warren, C., Myer, B., Moverly, D., Wong, L. J. & Pagad, S. (2022) Global Register of Introduced and Invasive Species - Pitcairn Islands - Great Britain. Version 1.7. Invasive Species Specialist Group ISSG. Checklist dataset. );
Terrestrial. An introduced Polynesian weed. Leaves grazed by goats. One station seen at Down Rope. Florence 11020. (Florence, J., Waldren, S. & Chepstow-Lusty, A.J. (1995)The flora of the Pitcairn Islands: a review, Biological Journal of the Linnean Society, 56, pp. 79119.);
The settlers may have accidentally introduced this weed species, although the species might equally well have moved following adherence to birds feathers and the caryopses of the latter are probably capable of flotation. (Waldren, S., Wesiler, M.I., Hather, J.G. & Morrow, D. (1999)The non-native vascular plants of Henderson Island, South Central Pacific Ocean, Atoll Research Bulletin, 463, pp. 114. Available at: https://doi.org/10.5479/si.00775630.463.1);
Christian, M., Warren, J., Warren, C., Myer, B., Moverly, D., Wong, L. J. & Pagad, S. (2022) Global Register of Introduced and Invasive Species - Pitcairn Islands - Great Britain. Version 1.7. Invasive Species Specialist Group ISSG. Checklist dataset.; Florence, J., Waldren, S. & Chepstow-Lusty, A.J. (1995)The flora of the Pitcairn Islands: a review, Biological Journal of the Linnean Society, 56, pp. 79119.; Waldren, S., Wesiler, M.I., Hather, J.G. & Morrow, D. (1999)The non-native vascular plants of Henderson Island, South Central Pacific Ocean, Atoll Research Bulletin, 463, pp. 114. Available at: https://doi.org/10.5479/si.00775630.463.1; Fosberg, F.R., Sachet, M.H. & Stoddart, D.R. (1983)Henderson Island (Southeastern Polynesia): summary of current knowledge, Atoll Research Bulletin, 272, pp. 147. Available at: https://doi.org/10.5479/si.00775630.272.1;