Page authors: Don Knoke, David Giblin
Lomatium simplex
nine-leaf biscuit-root
WTU specimens
Other herbaria

Distribution: East of the Cascades in Washington; widely distributed east of the Continental Divide in Montana south to Colorado.

Habitat: Dry, open areas at low elevations.

Flowers: March-May

Origin: Native

Conservation Status: Not of concern


Perennial from an elongate and slightly thickened taproot, 2-8 dm. tall, the stems solitary or few, erect, covered with fine but stiff hairs.


Leaves chiefly basal or low-cauline; leaves ternately 2-3 times cleft into long, linear segments, 1-10 cm. long.


Inflorescence of compound umbels, the rays unequal, 2-10 cm. long at maturity; involucre none, involucel bractlets inconspicuous; calyx teeth none; flowers light yellow.


Fruit broadly elliptic, 7-15 mm. long and 3-7 mm. wide, the lateral wings about as wide as the body.

Accepted Name:
Lomatium simplex (Nutt.) J.F. Macbr.

Synonyms & Misapplications:
Lomatium platycarpum (Torr.) J.M. Coult. & Rose
Lomatium simplex (Nutt.) J.F. Macbr. var. leptophyllum (Hook.) Mathias
Lomatium simplex (Nutt.) J.F. Macbr. var. simplex
Lomatium triternatum (Pursh) J.M. Coult. & Rose ssp. platycarpum (Torr.) Cronquist [HC]
Additional Resources:

PNW Herbaria: Specimen records of Lomatium simplex in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lomatium simplex checklist entry.

E-Flora BC: Lomatium simplex atlas page.

CalPhotos: Lomatium simplex photos.

USDA Plants: Lomatium simplex information.

30 photographs:
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