Botanical atlas

Osha

Ligusticum porteri

For generations, osha has been one of the most trusted roots of the Southern Rocky Mountains, dug each fall by Navajo, Zuni, Apache, and Ute herbalists and carried home to see families through the cold season. Its pungent, celery-like root was chewed for sore throats, simmered into teas for coughs and congestion, and kept in pouches as a traveler's remedy against the chest colds that came with high-altitude winters. Ranchers and mountain travelers later adopted the same root, calling it Colorado cough root, and it remains one of the most recognized wild roots in Southwestern herbal tradition today.

Safety.

Belongs to the carrot family and grows alongside deadly lookalikes such as poison hemlock and water hemlock, which have killed foragers who misidentified them, so never gather the root without expert identification. Traditionally avoided during pregnancy, and those with celery or carrot allergies should use caution.