Eriodictyon trichocalyx is a species of flowering plant in the borage family known by the common name shiny-leaf yerba santa.
It is native to Southern California and Baja California, where it grows in several habitat types, including chaparral and grassland. It is similar to E. crassifolium and grows in some of the same areas.
The Cahuilla people of California used it to treat coughs, colds, sore throats, asthma, tuberculosis, and catarrh. It was also used as a liniment and a poultice. The Cahuilla also used it as a tea bath, where it relieved rheumatism, tired limbs, fevers, and sores.
The Chumash also used it as a liniment for the feet and chest.