Senecio pattersonensis is an uncommon species of flowering plant in the aster family known by the common names Mono ragwort. and Mount Patterson senecio. Distribution It is endemic to eastern California in Mono County, in a small area of the Eastern High Sierra Nevada peaks at elevations of . It grows in rocky high mountain habitat in an alpine climate, such as talus and fellfields. It is named for Mount Patterson, the highest peak in the rugged Sweetwater Mountains subrange of the Sierra Nevada, in Mono County. Description Senecio pattersonensis is a small perennial herb producing one to three stems from a rhizome, the plant generally not exceeding ten centimeters in height. The herbage is hairless and green to red in color. The leaves are thick and often fleshy, measuring 2 to 4 centimeters long. They are narrow and linear or lance-shaped, sometimes with wavy edges or divisions into lobes. The inflorescence bears one to four flower heads containing yellow disc florets and usually 8 ray florets measuring one half to one centimeter in length. It blooms from July to August. References External links CalFlora Database: Senecio pattersonensis (Mono ragwort, Patterson's senecio) Jepson Manual eFlora (TJM2) treatment of Senecio pattersonensis USDA Plants Profile: Senecio pattersonensis (Mono ragwort) UC CalPhotos gallery of Senecio pattersonensis (Mono ragwort) pattersonensis Endemic flora of California Alpine flora Flora of the Sierra Nevada (United States) Natural history of Mono County, California