Herrickia horrida is a species of flowering plant in the aster family known by the common name horrid herrickia. It is native to Colorado and New Mexico in the United States, where it occurs only in the Animas River basin. It is often included in genus Eurybia. Herrickia horrida grows on dry mountain slopes and canyons, often in oak woodlands, pinyon-juniper woodlands and grasslands. Most of its habitat is rugged and inaccessible, which helps protect it from human threats.