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.

"fine" is not a number.

... more about "Arctium lappa"
36 +, 34 +  and 32 +
scarious +
obtuse +  and acute +
racemiform +  and paniculiform or corymbiform +
indeterminate +  and determinate +
David J. Keil +
Linnaeus +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
25 cm250 mm <br />0.25 m <br /> (80 cm800 mm <br />0.8 m <br />) +
sparsely short-hairy +  and nearly glabrous +
coarsely dentate;subentire +
20cm;70cm +
10-nerved or 20-nerved +  and rugose +
Great burdock +  and grande bardane +
actinomorphic +
pink +  and more or less purple +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
compressed +  and obovoid +
fertile +  and bisexual +
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 +
tomentose +  and resin-gland-dotted +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Waste places, roadsides, fields, forest clearings +
reflexed +, spreading +  and minute +
long-pedunculate +
in corymbiform , paniculiform or racemiform , arrays +  and singly +
indeterminate +
each +  and sessile +
erect +  and ascending +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
spheric;ovoid +
long-petiolate +
cauline +  and basal +
smaller +
triangular +
usually lobed +  and dissected +
2-carpellate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
2.5 cm25 mm <br />0.025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
cobwebby +  and glabrous +
15 cm150 mm <br />0.15 m <br /> (36 cm360 mm <br />0.36 m <br />) +
Flowering summer–early fall (Jul–Oct). +
glabrous +  and loosely cobwebby +
papillate +  and smooth +
distinct +  and fused +
hairy-ringed +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
subulate +
exalbuminous +
Introduced +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Compositae +
Arctium lappa +
species +
campanulate +
elongate +
perennial +  and biennial +
50 cm500 mm <br />0.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +