Family: Asteraceae

Scientific Name: Arctium minus

Common Name: Common Burdock, Burdock, Cockleburs, Wild Rhubarb

Description

Common Burdock (Arctium minus) A very common biennial weed that produces a bur seed pod. This "hitchhiker" readily attaches to any passer-by.  Can be ecologically invasive if allowed to reseed. I grew up calling this plant Wild Rhubarb.

Plant TypeWeeds, Biennials, Site author's observations
Sunlightfull sun to shade.
Moistureaverage, during seasons of high moisture many more seedlings seem to be produced, I have seen areas carpeted with seedlings
Soil & Siteaverage, wasteland
Flowersinflorescence produced on the second year plant, small red-violet disk flowers
Fruitflower heads form a brown, dry rounded hooked seed pod (bur), hard to remove from clothing, epizoochory is the dispersal of seeds by catching onto the fur of animals
Leavesfirst year plant produces a large rosette of large, broadly ovate leaves, second year plants produce a much branched stem reaching over 3 feet.
Stemsstout, round or slightly ridged in circumference, light green to slightly reddish-green, young stems are covered with white cobwebby hairs, mature stems become glabrous
Rootsthick, fleshy tap root
Dimensionslow flatten the first year, 3-5 feet tall the second
Maintenancecan become an aggressive reseeder so removal of seed can prevent this, do this before the fruit dries and forms the hooks
Propagationreproduces by seeds produced on the second year plant can make 300,000-400,000 seeds per plant
Native SiteEurope
Misc FactsEuropean, naturalized throughout most of USA, from the Greek name arktos. AKA: lesser burdock] little burdock, louse-bur, common burdock, button-bur, cuckoo-button, or wild rhubarb
Author's NotesReported to be poisonous, but looking through many resources, I found no mention of this. The leafstalks (a year old or younger) and flower stalks can be eaten raw or cooked. The roots are edible boiled with a change of water. Maybe the inspiration for Velcro?
Notes & Reference#14-Hedge maids and Fairy Candles (Jack Sanders) , #19-Common Weeds ( USDA Agricultural Research Service) , #49-The History and Folklore of North American Wildflowers (Timothy Coffey)
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