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Taxon author: Steyerm. ex Rothr.

ITIS records citing taxon author "Steyerm. ex Rothr."
 
 Kingdom Plantae
  Grindelia hallii Steyerm. ex Rothr. -- not accepted
  Grindelia hirsutula var. hallii (Steyerm. ex Rothr.) M.A. Lane -- not accepted -- Hall's gumweed
   

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