Acaena buchananii

Acaena buchananii

Acaena buchananii Hook. f.
Engl.: New Zealand bur, pirripirri-bur.
Deu.: Buchanan-Stachelnüsschen.
Suom.: siniakeena.
Sven.: blå taggpimpinell.

I have no articles for this botanical term, but there might be some for the next level down (if found).