Arctium lappa

Linnaeus
Sp. Pl. 2: 816. 1753.
Common names: Great burdock grande bardane
Introduced
Treatment appears in FNA Volume 19. Treatment on page 169.

Plants to 100–300 cm. Basal leaves: petioles solid, 15–36 cm, glabrous or thinly cobwebby; blades 25–80 × 20–70 cm, coarsely dentate to subentire, abaxially thinly gray-tomentose, adaxially green, sparsely short-hairy to nearly glabrous. Heads usually in corymbiform clusters, long-pedunculate. Peduncles 2.5–6 cm. Involucres 25–45 mm diam. Phyllaries linear to linear-lanceolate, glabrous to loosely cobwebby, inner usually stramineous (sometimes purplish), margins with minute spreading or reflexed hairs. Florets 40+; corollas purple (occasionally white), 9–14 mm, glabrous. Cypselae light brown, often with darker spots, 6–7.5 mm; pappus bristles 2–5 mm. 2n = 32 (Japan), 34 (China), 36 (Japan); (Sweden).


Phenology: Flowering summer–early fall (Jul–Oct).
Habitat: Waste places, roadsides, fields, forest clearings
Elevation: 0–2200 m

Distribution

V19-184-distribution-map.gif

Introduced; Alta., B.C., Man., N.B., Ont., Que., Sask., Ala., Ariz., Calif., Colo., Conn., Ill., Maine, Mass., Mich., Minn., Nev., N.H., N.Y., N.Dak., Pa., R.I., Utah, Vt., Wash., Wis., Eurasia.

Discussion

BONAP lists Georgia, Idaho, Indiana, Iowa, Maryland, Montana, New Jersey, North Carolina, Ohio, Oregon, and Wyoming; I have not seen specimens.

Roots and young leaves of Arctium lappa are edible and can be used in a variety of food preparations. Extracts of Arctium species purportedly have health benefits and are sold as food supplements. This species is sometimes cultivated as a minor crop.

Selected References

None.

Lower Taxa

None.

... more about "Arctium lappa"
David J. Keil +
Linnaeus +
Asteraceae tribe Cynareae +
Great burdock +  and grande bardane +
Alta. +, B.C. +, Man. +, N.B. +, Ont. +, Que. +, Sask. +, Ala. +, Ariz. +, Calif. +, Colo. +, Conn. +, Ill. +, Maine +, Mass. +, Mich. +, Minn. +, Nev. +, N.H. +, N.Y. +, N.Dak. +, Pa. +, R.I. +, Utah +, Vt. +, Wash. +, Wis. +  and Eurasia. +
0–2200 m +
Waste places, roadsides, fields, forest clearings +
Flowering summer–early fall (Jul–Oct). +
Introduced +
Compositae +
Arctium lappa +
species +