Haplopappus lanceolatus var. tenuicaulis (D.C. Eaton) A. Gray
Haplopappus lanceolatus var. tenuicaulis (D.C. Eaton) A. Gray is a synonym sensu FNA Ed. Comm., 2006b of:
Pyrrocoma lanceolata (Hooker) Greene var. lanceolata, an accepted variety name sensu FNA Ed. Comm., 2006b.