Yerba \Yer"ba\, n. [Sp.]

(Bot.) An herb; a plant.

Note: This word is much used in compound names of plants in Spanish; as, yerba buena [Sp., a good herb], a name applied in Spain to several kinds of mint (Mentha sativa, viridis, etc.), but in California universally applied to a common, sweet-scented labiate plant (Micromeria Douglasii).

Yerba dol osa. [Sp., herb of the she-bear.]

A kind of buckthorn (Rhamnus Californica).

Yerba mansa. [Sp., a mild herb, soft herb.]

A plant (Anemopsis Californica) with a pungent, aromatic rootstock, used medicinally by the Mexicans and the Indians.

Yerba reuma. [Cf. Sp. reuma rheum, rheumatism.]

A low California undershrub (Frankenia grandifolia).

Source: Webster's Revised Unabridged Dictionary (1913)