Lomatium is a genus of about 75 species of perennial herbs native to western North America; its common names include biscuitroot, Indian parsley, and desert parsley. It is in the family Apiaceae and therefore related to many familiar edible species such as carrots and celery; some Lomatium species were extensively used by Native Americans in the inland Northwest as a staple food.
Use of lomatium extracts or tinctures containing the resin (and possibly the coumarins) can, in some people, cause a whole-body rash. This herb may also lead to nausea in some people.