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Taxon author: (Petr.) J.T. Howell

ITIS records citing taxon author "(Petr.) J.T. Howell"
 
 Kingdom Plantae
  Cirsium callilepis var. oregonense (Petr.) J.T. Howell -- not accepted
  Cirsium callilepis var. pseudocarlinoides (Petr.) J.T. Howell -- not accepted
  Cirsium douglasii var. canescens (Petr.) J.T. Howell -- not accepted
   

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