homotypic synonyms:
Amellus spinulosus Pursh; Dieteria spinulosa (Pursh) Nutt.; Haplopappus spinulosus (Pursh) DC.; Sideranthus spinulosus (Pursh) Nutt. ex Nees; Sideranthus spinulosus (Pursh) Sweet ex Rydb.; Xanthisma spinulosum (Pursh) D.R.Morgan & R.L.Hartm.;
heterotypic synonyms:
Haplopappus texensis R.C.Jacks.; Machaeranthera texensis (R.C.Jacks.) Shinners; Sideranthus turbinellus Rydb.;

protologue: : ()
URL protologue: https://archive.org/stream/#page//mode/2up

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