Ternate Desert Parsley (Biscuit Root)
Lomatium triternatum (Pursh) J. M. Coult. & Rose

Collected along the Clearwater River between the mouth of the Potlatch River to just downstream of Pine Creek in Nez Perce Co., Idaho, on 6 May 1806.
(Source)

Perennial herb growing to 2-2 1/ feet. The flowers are tiny, borne in the open, flat topped clusters of smaller round clusters blooming in April through July.  The fruit are flattened, winged, seed-like schizocarps about 1/4 to 3/8 inch long. It has finely hairy, 1/2 to 4 inch long linear leaf segments, plus a whorl of bracts at the base of its yellow flower clusters. 

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil. It cannot grow in the shade. It requires dry or moist soil. It is found on the foothill and mountain slopes of Idaho, Montana, and Wyoming.

Food Uses
The root is eaten raw or cooked. About the size of peanuts, the roots were a staple food of the local native North American Indian tribes. When roasted it makes an excellent vegetable. It can also be dried and ground into a powder, when it develops a mild sweet flavor.

The dried flowers and upper leaves are used as a flavouring in soups and stews.

Medicinal Uses
An infusion of the leaves and roots has been used in the treatment of chest complaints. An infusion of the flowers and upper leaves has been used in the treatment of colds and sore throats.