Page author: Jim Duemmel
Lomatium knokei
Knoke's biscuit-root, Knoke's desert-parsley, Knoke's lomatium

Distribution: Occurring east of the Cascades crest, where endemic to Kittitas County.

Habitat: Open, vernally wet, gently sloping meadows of fine-textured clay soils at approximately 1200 meters.

Flowers: May-June

Origin: Native

Growth Duration: Perennial

Conservation Status: Threatened in Washington (WANHP)

Pollination: Bees, flies, butterflies, beetles, wasps


Glabrous perennial from a taproot, 0.8-3.4 dm. tall; root 2-28 cm long, with a slight tuberous swelling 0.5-2 cm long that narrows to a simple taproot.


Ttypically 3, basal, 9-18 cm long and 4-17 cm wide, ternately or ternate-pinnately 2-several times divided into narrow ultimate segments 3-27 mm long and 0.2-2.3 mm wide.


Inflorescence a compound umbel, the rays typically unequal, flowers yellow, 1-28 mm long; involucel bracts narrow to linear, bract number 0u201314 with typically values of 5 to 7. Bracts are 1.5u20136.4 mm in length, 0.1u20130.8 mm in width, free to base, often with a well-developed mid-vein, occasionally inserted on flower pedicels.; pedicels 0.7-2.6 mm. long.


Glabrous, elliptic, 4.0-7.8 mm long and about 6 mm wide, quite flat; the wings 0.2-0.5 mm wide.

Accepted Name:
Lomatium knokei Darrach
Publication: Darrach, M.E. 2014. Phytoneuron 2014-109: 1–12. 2014.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Lomatium knokei checklist entry.

OregonFlora: Lomatium knokei information.

E-Flora BC: Lomatium knokei atlas page.

CalPhotos: Lomatium knokei photos.

USDA Plants: Lomatium knokei information.

18 photographs:
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