See quotations.

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1833.  We killed a grey bear, that was exceedingly fat. It had fattened on a nut of the shape and size of a bean, which grows on a tree resembling the pine, called by the Spanish, pinion.—‘Narrative of James O. Pattie,’ p. 43 (Cincinnati).

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1846.  The burrs of the pine, which have fallen to the ground, are sometimes twelve inches in length, and contain a nut, (piñon,) which, although it is said to be nutritious, is not agreeable to the taste.—Edwin Bryant, ‘What I saw in California,’ p. 236 (N.Y.). (Italics in the original.)

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