Levisticum officinale Koch

Levisticum officinale Koch, Nova Acta Acad Leop.-Carol. 12: 101. 1825.
Ligusticum Levisticum L. Sp. PI. 250. 1753.
Angelica paludapifolia Lam. Fl. Fr. 3: 451. 1778.
Angelica levisticum All. Fl. Ped. 2: 10. 1785.
Levisticum vulgare Reichenb. Fl. Germ. Exc. 463. 1832.
Levisticum' paludapifolium Asch. Fl. Brand. 1: 250. 1860.
Levisticum Levisticum Karst. Dents. Fl. 844. 1882.
Selinum Levisticum E. H. L. Krause in Sturm. Fl. Deuts. ed. 2. 12: 116. 1904.
Hipposelinum Levisticum Britt. & Rose in Britt. & Br. 111. Fl. ed. 2. 2: 635. 1913.
Plants 1-2 m. high; basal leaves ovate in general outline, excluding the petioles 25-70 cm. long, 15-65 cm. broad, pinnately decompound, the leaflets broadly ovate to oblong, cuneate, 3-1 1 cm. long, 1-7 cm. broad, coarsely dentate or lobed above the middle; peduncles 5-10 cm. long; involucre of numerous lanceolate, acute, scarious bracts, 5-10 mm. long, reflexed; involucel of bractlets like the bracts, up to 5 mm. long; rays 12-20, spreading-ascending, unequal, 2-6 cm. long, scaberulous; pedicels spreading, 1-5 mm. long, densely scaberulous; fruit ovoidoblong, 4—7 mm. long, 2-3 mm. broad, compressed dorsally, the ribs all about equally narrowly winged; oiltubes small, 1 or 2 in the intervals, 2-4 on the commissure; seed-face plane.
Type locality: "In Apenntnis Liguriae." collector unknown.
Distribution: Southern Europe; escaped from cultivation, Vermont to Pennsylvania and New Jersey, Missouri, New Mexico.