Arjaknu (Isem usnan: Centaurea acaulis) d talmest n yemɣi seg twacult n tetrawt. Carl Von Linné d amdan amezwaru i yuran fell-as deg useggas n 1753. Tilmas Ismawen Isem-is s latinit: Centaurea acaulis Isem-is s tefransist: Centaurée sans tige Ismawen-is nniḍen s teqbaylit: Arjaken, Uzag Ismawen-is nniḍen s tmaziɣt: Isseqdac == Tiwelhiwin ==