P. vulgaris

from The Collaborative International Dictionary of English v.0.48
Frijol \Fri"jol\, Frijole \Fri"jole\, n.; pl. {Frijoles}. Also
Frejol \Fre"jol\ [Sp. fr['i]jol, fr['e]jol.]
   1. In Mexico, the southwestern United States, and the West
      Indies, any cultivated bean of the genus {Phaseolus}, esp.
      the black seed of a variety of {P. vulgaris}.
      [Webster 1913 Suppl.]

   2. The beanlike seed of any of several related plants, as the
      cowpea. Frijoles are an important article of diet among
      Spanish-American peoples, being used as an ingredient of
      many dishes.
      [Webster 1913 Suppl.] frijolillo
    

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