Wormwoods & Mugworts

Common Wormwood Common Mugwort Field Wormwood Field Wormwood

What are they?

This is a group of plants in the daisy family (Asteraceae), although the rather small and underwhelming flowers may not make this immediately apparent. However, a closer inspection of a 'flower' will reveal that it consists of a tight collection of tiny florets, surounded by an outer layer of small, overlapping bracts. Thus, the flowers are very like those of daisies, but without the outer ring of showy petals.

Where are they found?

Wormwoods are mostly highly aromatic plants, often with silvery foliage, which has made them attractive as garden ornamentals. Most are persistent perennials so such plants are most likely to be found as survivors from dumped garden waste on roadsides and waste ground. We also have three native species with Common Ragwort being abundant in all kinds of grassy places while Sea Wormwood occurs in saltmarsh.

Identification

Members of this group are easily recognisable by their branching heads of many, petalless flowers which appear generally in late summer and held well above the foliage. With the flowers all being rather similar, identification to species mostly rests on details of the hairs (with several species being thickly clothed in white hairs so as to appear silvery from a distance) and the shape of the leaves.



Common Mugwort      Artemisia vulgaris

Probably an ancient introduction, now well established. An abundant species that grows in all kinds of grassy places, especially roadsides and field edges. Flowers July to September. A very variable species in the shape of its leaves, which tend to have broader lobes on basal, early-season leaves and narrow, fingered lobes on upper leaves. The leaves are green above and contrastingly whitish below with a strong but not unpleasant aroma. An aggressive perennial that can spread to form large colonies of dense stems, to 150cm in height.

Common Mugwort Common Mugwort Common Mugwort Common Mugwort
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Chinese Mugwort      Artemisia verlotiorum

A rare introduction from Asia, recorded a handful of times in East Anglia but which may become more common in the future. Flowers October to November. Rather similar to Common Mugwort but forms a more open, less upright plant, the deeper green leaves being more finely cut and continuing as leafy bracts well into the flowerhead.

Chinese Mugwort Chinese Mugwort Chinese Mugwort
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Common Wormwood      Artemisia absinthium

An ancient introduction as a herbal remedy that is uncommon but persists in a few grassy places on roadsides and commons. Flowers July to August. A Silvery-grey species with neatly dissected leaves. Plants may be upright or more open and semi-prostrate in habit.

Common Wormwood Common Wormwood Common Wormwood Common Wormwood
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Sea Wormwood      Artemisia maritimum

A native species of saltmarshes where it can be locally common on slightly drier ground along natural levees beside creeks. More recently starting to appear as a plant of salted roadsides. Flowers August to September. Leaves aromatic and deeply cut almost to the veins into very narrow lobes.

Sea Wormwood Sea Wormwood Sea Wormwood Sea Wormwood
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Field Wormwood      Artemisia campestris

A very rare native which in the UK is found only in Breckland. Although once more widespread in very dry, Breckland heaths, this plant is now considered native at just three sites, though it has been recently introduced to a few more, protected sites. Flowers August to September. A graceful species to 75cm in height, usually forming a many-branched clump. Leaves silvery green, very finely cut into linear segments.

Field Wormwood Field Wormwood Field Wormwood Field Wormwood
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Annual Mugwort      Artemisia annua

A rare introduction from eastern Europe and central Asia, recorded in Cambridgeshire. Flowers August to September. Unusual in this group in being an annual, which can be deduced by the lack of old, woody stems bases. Leaves bright green, richly aromatic and in appearance rather like those of Feverfew.

Annual Mugwort Annual Mugwort Annual Mugwort Annual Mugwort
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Tarragon      Artemisia dracunculus

Rare as a garden throw-out in waste places, twice recorded in our region. Flowers July to October. The whole plant has a strong, herby smell and typical wormwood flowers, but differs from other species in its simple leaves.

Tarragon Tarragon Tarragon
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