Ligusticum filicinum S. Wats.

Ligusticum filicinum S. Wats. Proc. Am. Acad. 11: 140. 1876
Ligusticum apiifolium Benth. & Hook.; S. Wats. Bot. King's Kxpl. 125. 1871. Not /.. apiifolium
Gray, 1868. Ligusticum scopulorum sensu Parry, Am. Nat. 9: 271. 1875. Not L. scopulorum A. Gray, 1868.
Slender, caulescent, freely branched, 5-10 dm. high, glabrous throughout or the inflorescence seaberulous; leaves ovate to deltoid in general outline, excluding the petioles 1-3 cm. long, ternate-pinnately decompound, the ultimate divisions linear, acute, mucronate, 3-12 mm. long, 1-3 mm. broad; petioles 6-20 cm. long; cauline leaves few, like the basal, reduced upwards, short-petiolate or sessile with dilated sheaths; peduncles alternate or verticillate, 6-17 cm. long; involucre wanting; involucel of 1-several short, filiform bractlets, or wanting; rays usually 10-20, slender, spreading-ascending, subequal, 2.5-6 cm. long; pedicels slender, spreading-ascending, 8-12 mm. long; calyx-teeth minute; flowers white; fruit oblong, 5-7 mm. long, 2-3 mm. broad, slightly compressed laterally, the ribs narrowly winged; oil-tubes 3-5 in the intervals, 6-S on the commissure; seed dorsally flattened in cross section, the face plane to slightly concave.
Type locality: Uintah Mountains, northern Utah, Watson 454.
Distribution: Montana and Wyoming, west to Utah and Idaho {Parry 121, Payson &• Payson 4979).
8a. Ligusticum filicinum var. tenuifolium (S. Wats.) Math. & Const. Bull. Torrey Club 68: 123. 1941.
Ligusticum tenuifolium S. Wats. Proc. Am. Acad. 14: 293. 1879. Ligusticum oreganum Coult. & Rose. Contr. U. S. Nat. Herb. 7: 138. 1900.
Very slender, subscapose; leaves oblong to oval, 6-14 cm. long, 3-7 cm. broad; cauline leaf usually solitary, reduced, sessile; rays 5-15, 1.5-3 cm. long; pedicels 3-8 mm. long; fruit 3-5 mm. long.
Type locality: Mountains of Colorado, Hall &• Harbour 216 (part).
Distribution: Colorado and Montana, west to Utah and eastern Oregon (Constance &■ Jacobs 1329, Payson & Payson 5118).

Ligusticum apiifolium is a species of plant in the carrot family known by the common names celery-leafed lovage and celery-leaf licorice-root. It resembles other carrot-like plants, bearing umbels of whitish or brownish flowers.

This plant is native to California, Oregon, and Washington, where it is found in coastal areas.