Arctium tomentosum Mill.
Family: Asteraceae
cotton burdock,  more...
Arctium tomentosum image
Emmet J. Judziewicz  

Etymology
: tomentosum = (Latin) having a mass of rough hairs
Plants
: erect, biennial, 2'-4' tall forb
Leaves
: alternate, large, heart-shaped base, on stalks getting shorter toward the top, lower stalks mostly hollow
Flowers
: head 1/2"-1" wide with pink to purple disk flowers, densely woolly, bracts(phyllaries) only slightly hooked; inflorescence a cluster of long-stalked heads
Fruits
: round, slightly bristly bur
Conservation Status
: Introduced - locally established
Similar to A. minus, but inflorescences corymbose, the bracts densely cottony-pubescent. 2n=36 (Poddubnaja 1944, ex 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 to temperate Europe, Caucasus and Siberia (Hegi), in the United States more common to the south and east. Collected just seven times in Wisconsin. The first three were: Ashland Co. : Weed at Berkshire Mine, Mellen, Sept. 7, 1927 [fr], Fassett 10084 (WIS); Town of Morse, Aug. 31, 1939 [fl], M clntosh c-812 (MIL, WISM). Fond du Lac Co.: Campbellsport, nea:r railroad sta., Aug. 1911 [fr], Ogden 24994 (MIL).

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 tomentosum image
Emmet J. Judziewicz  
Arctium tomentosum image
Flora.cyberia  
Arctium tomentosum image
Emmet J. Judziewicz  
Arctium tomentosum image
Botanical Illustration  
Arctium tomentosum image
from USDA Plants website  
Arctium tomentosum image
Arctium tomentosum image
Arctium tomentosum image
Arctium tomentosum image
Arctium tomentosum image
Arctium tomentosum image
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