Lesser Burdock
Plants of the Eloise Butler Wildflower Garden

Common
Name

Scientific
Name

Plant
Family

Garden
Location

Prime
Season

Lesser (Common) Burdock

and Great Burdock

Arctium minus Bernh.

& Arctium lappa L.

Aster (Asteraceae)
Upland
Late Summer
Other names and notes
Burdocks are large leaved, coarse plants of waste places, erect and biennial. First year plants have a rosette of basal leaves. Leaves are egg-shaped, lower leaves with heart-shape bases, sometime entire or with a few blunt teeth. The pink to purplish disk flowers occur in bristly heads. Each floret has a pinkish corolla, cylinder in form with 5 upward lobes. These surround a sheath formed by the dark purple anthers and from the center of that comes the white style with a bifurcated tip. The bristly effect is from the green bracts of the flowers which have inward curving hooks at their tip. At maturity these make the fruit a clinging, prickly bur which contains several small black seeds. Dogs are quite familiar with burdock burs. The main visual differences between these two species is that A. minus has flower heads 1/2 to 1" wide, either stalkless or on short stalks, whereas A. lappa has heads 1 to 1-1/2" wide, on long stalks. In the lower leaf stalks, A. minus are mostly hollow and A. lappa are solid with deep groves. A. lappa can grow to 9' high, A. minus usually no more than 5 feet. Burdocks grow in full sun to partial shade, in a range of soil condition. Lesser Burdock is invasive.
Lesser Burdock flowers
Lesser Burdock closeup
Below left: Note in the disk florets, the cylinder shape of the corolla with five upward pointing lobes, which surrounds the dark purple anthers, which in turn, envelope the white style. Above right: Note the inward curved tips of the green bracts.
Lesser Burdock Flower
Lesser Burdock flower stalk
Below: A lower leaf with typical heart-shaped base.
Below: Note that upper leaves do not have the pronounced heart-shaped base.
Below: When the disk florets die away, the bracts become stiff clinging burs.
Burdock lower leaf
Burdock flower stem
Burdock Bur
 
Lesser burdock
 

Notes: Burdocks are European imports that have naturalized themselves throughout North America except the far north. That said, there are a great many counties in Minnesota, principally in the western half of the state, that do not report their presence. They are not indigenous to the Garden but have been around many years. Martha Crone listed A. minus on her 1951 Garden census.

Lore and uses: It may surprise one to realize that this rough looking plant has important food and medicinal uses - both in America and in the Old World from which it came. Shakespeare makes reference to the plant in three plays. Here is a brief summation of uses:

Medicinal: The medicinal use of Burdock is thought to be more important than the food use. Dried root from first year plants is considered the official drug and one of the best blood purifiers. It was also used in treating skin diseases, especially in the treatment of eczema. Seeds and leaves were also used. Leaves provided use as a poultice and for an infusion. In North America the seeds were considered very important to make a tincture and extract for chronic skin diseases. Hutchins gives specifics on process and some uses. She also mentions the wide use of the plant in the folk medicine of Russia. One particular example from the old days is Burdock oil, called Repeinoe Maslo in Russian, as a hair tonic to strengthen and encourage the growth of new hair. This use was in fact somewhat confirmed by a line in the first novel of contemporary Russian poet Yevgeny Yevtushenko, (Wild Berries 1981), in which he writes "Once Karyakin, the haberdasher, came by and examined the painting for a long time. Then smoothing his hair, greased with burdock oil and cut "in Parentheses," he asked Barkhotkin senior . . ." Culpeper has much to say about Burdock in The English Physician, including this - "The leaves applied to the places troubled with the shrinking of the sinews or arteries, give much ease. The juice of the leaves, or rather the roots themselves, given to drink with old wine, doth wonderfully help the biting of any serpents; and the root beaten with a little salt, and laid on the place, suddenly easeth the pain thereof, and helpeth those that are bit by a mad dog. The juice of the leaves being drank with honey, provoketh urine, and remedieth the pain of the bladder."

Food: Originally brought to the new world as a food source, it can still be found at some markets in the old world and in speciality organic food stores in the U.S. In Japan, cultivars are grown for food market purposes. The root, leaves and stem are useful as foods. The pith of the root and of the leaf stalks can be cooked as a vegetable or used as a potherb. The root is to be collected in the fall from first year plants and the leaf stems must be stripped of all the outer rind. Collect leaves before the flowers form. In eastern Asia, sliced root is used for stir-fry, especially good with sesame seed and soy sauce. The young stalks when boiled are said to resemble asparagus in taste and stalks and young leaves make a pleasant salad. The root is a long taproot, often up to 2 feet long and of 2 to3 lbs. weight. Roasted ground root can be used for a tea and as a coffee substitute.

You can read much additional information in Fernald, Hutchens, Harrington, Tilford, and Mrs. Grieve. (Ref. #'s 6, 12, 9, 39, 7 respectively). Hutchens and Mrs. Grieve are particularly good.

 
 

 
References: Plant characteristics are generally from sources 15, 16, 30, 31, 33, W2 & W3. Distribution principally from W2 and also 31, 34 and W1. Planting history generally from 1, 4 & 4a. Other sources by specific reference. See Reference List for details.  
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