Roman Wormwood, Bitterweed, Blackweed, Carrot Weed, Hay Fever Weed, Stickeweed, Tassel Weed, Wild Ta

Ambrosia artemesiifolia

Physical Characteristics

Ambrosia artemesiifolia is a ANNUAL growing to 0.9 m (3ft) by 0.2 m (0ft 8in) at a medium rate. See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from August to October. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Distribution

N. America - British Columbia to Nova Scotia and Florida. Locally established casual in Britain[17].

Habitats

Woodland Garden Cultivated Beds;

Edible Uses

Edible Parts: Oil Edible Uses: Oil An oil is obtained from the seed. It has been suggested for edible purposes because it contains little linolenic acid[61, 183]. The seed contains up to 19% oil[61], it has slightly better drying properties than soya bean oil[183].

Medicinal Uses

Antidote Astringent Disinfectant Emetic Febrifuge Women's complaints The leaves are very astringent, emetic and febrifuge[222, 257]. They are applied externally to insect bites, rheumatic joints and various skin complaints, internally they are used as a tea in the treatment of fevers, pneumonia, nausea, intestinal cramps, diarrhoea and mucous discharges[222, 257]. Juice from the wilted leaves is disinfectant and is applied to infected toes[257]. A tea made from the roots is used in the treatment of menstrual disorders and stroke[222]. The pollen is harvested commercially and manufactured into pharmaceutical preparations for the treatment of allergies to the plant[222].

Known Hazards

The pollen of this plant is a major cause of hayfever in N. America[207, 222]. Ingesting or touching the plant can cause allergic reactions in some people[222].