Picris spinosa (DC.) Poir. in Lamarck, Encycl. Suppl. 4: 408. 1816
Picris spinosa in Lamarck, Encycl. Suppl. 4: 408. 1816
is new combination for Helminthia spinosa in Lamarck & Candolle, Fl. Franç., ed. 3, 4: 58. 1805
Picris spinosa in Lamarck, Encycl. Suppl. 4: 408. 1816