Arctium lappa L.
Family: Asteraceae
great burdock
[Lappa major Gaertn.]
Arctium lappa image
Janice Stiefel  
Etymology: lappa = burdock
Plants
: erect, biennial, 3'-9' tall forb
Leaves
: alternate, large, heart-shaped base, on stalks getting shorter toward the top, lower stalks almost solid
Flowers
: head up to 1 1/2" wide with pink to purplish disk flowers, bracts (phyllaries) with hooks curving inward; inflorescence a cluster of long-stalked heads; blooms Aug.-Oct.
Fruits
: round, bristly, 1/2" clinging bur (inspiration for Velcro)
Habitat
: roadsides, disturbed sites
Conservation Status
: Introduced - locally established
Similar to A. minus, but with larger glabrous heads 3-3.5 cm wide, 2.5-3 cm high, on long peduncles in corymbose inflorescences. 2n=32 (Darlington 1955).

Johnson, M.E. and H.H. Iltis. 1963. Preliminary reports on the flora of Wisconsin: No. 48. Compositae Family. Wisconsin Academy of Sciences, Arts & Letters. 52:255-342.

Native of temperate Eurasia, collected only 11 times in Wisconsin: first collections from (1) Iowa Co.: Roadside, July 27, 1961 [fl], Brady & Maduewesi s.n. (WIS). and (2) Lincoln Co.: Abandoned farm, Harrison Twp. Seymour 12693 (WIS).

Online Virtual Flora of Wisconsin. 2016. http//:wisflora.herbarium.wisc.edu. Accessed on December 27.

Johnson, M.E. and H.H. Iltis. 1963. Preliminary reports on the flora of Wisconsin: No. 48. Compositae Family. Wisconsin Academy of Sciences, Arts & Letters. 52:255-342.

Arctium lappa image
Janice Stiefel  
Arctium lappa image
Botanical Illustration  
Arctium lappa image
Marion Sheehan  
Arctium lappa image
Botanical Illustration  
Arctium lappa image
Botanical Illustration  
Arctium lappa image
Janice Stiefel  
Arctium lappa image
Arctium lappa image
Arctium lappa image
Arctium lappa image
Arctium lappa image
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