Horkelia muirii (A. Gray) Rydb.
      
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2 536324 Horkelia muirii (A. Gray) Rydb. [80 562601 Ivesia muirii A. Gray] Rosaceae
P.A. Rydberg, Monogr. N. Amer. Potent.: t. 90, fig. 6-10 (1898)