Horkelia pygmaea (A. Gray) Rydb.
      
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2 536341 Horkelia pygmaea (A. Gray) Rydb. [80 562612 Ivesia pygmaea A. Gray] Rosaceae
P.A. Rydberg, Monogr. N. Amer. Potent.: t. 93, fig. 1-7 (1898)