Eryngium amethystinum L.
      
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1 405311 Eryngium amethystinum L. Umbelliferae
T.F.L. Nees von Esenbeck, F.KL. Spenner, A. Putterlick, J.X.R. Caspary, Gen. Fl. Germ., vol. 6 fasicle 26, (Conspectus): , fig. 9-31 (1849)