Botanical atlas

Lomatium

Lomatium dissectum

Lomatium's thick, pungent root was one of the most valued medicines among Great Basin and Plateau peoples, including the Washoe, Northern Paiute, Shoshone, and Nez Perce, who dug it for coughs, colds, and lung troubles long before settlers arrived. It carries a well-known story from the 1917 to 1919 influenza pandemic, when a Nevada physician reportedly noticed that Washoe patients treated with lomatium root fared better than others, a tale that cemented its reputation as a serious respiratory herb in Western herbalism. Beyond the lungs, the mashed or chewed root was also applied to cuts, sores, and aching joints as a warming poultice.

Safety.

Lomatium can trigger a delayed, full-body rash with prolonged or higher-dose use, and its fresh root sap can cause skin irritation or sun-triggered blistering. It grows alongside truly deadly look-alikes like poison hemlock and water hemlock, so wildcrafting should only be done with expert guidance. It is best avoided during pregnancy, breastfeeding, or with autoimmune conditions.