Lomatium piperi is a species of flowering plant in the carrot family known by the common name Indian biscuitroot (and called mâmin in the local Sahaptin language). It is native to the Northwestern United States and northern California, where it grows in sagebrush and plateau habitat, and the Sierra Nevada and Cascade Mountains. Lomatium piperi is a perennial herb growing up to about 25 centimeters long from a spherical tuber no more than a centimeter wide. There is generally no stem, the leaves and inflorescence emerging at ground level. The leaf blades are divided into segments which are subdivided into narrow, flat lobes. The inflorescence is an umbel of white flowers with dark anthers. Lomatium piperi is a perennial herb growing up to about 25 centimeters long from a spherical tuber no more than a centimeter wide. There is generally no stem, the leaves and inflorescence emerging at ground level. The leaf blades are divided into segments which are subdivided into narrow, flat lobes. The inflorescence is an umbel of white flowers with dark anthers.