Biennial Wormwood

Artemisia biennis

Physical Characteristics

Artemisia biennis is a ANNUAL/BIENNIAL growing to 1 m (3ft 3in) by 0.5 m (1ft 8in). See above for USDA hardiness. It is hardy to UK zone 4. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind. Suitable for: light (sandy) and medium (loamy) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought.

Distribution

N. America - Quebec to British Columbia and south to New England, Indiana etc.

Habitats

Cultivated Beds;

Edible Uses

Edible Parts: Seed Edible Uses: Seeds edible in moderation. Historically gathered extensively by the Goshiute (“piawada”) and eaten as porridge or flour. Nutritionally oily and sustaining. Other parts are inedible due to bitterness and toxic sesquiterpene lactones. Seed[161, 177, 257]. No further details are given, but the seed is very small and fiddly to utilize[K].

Medicinal Uses

Parasiticide Poultice Skin The plant as been used in the treatment of stomach cramps, colic and painful menstruation[257]. Externally, it has been used for treating sores and wounds[257]. The report does not specify which part of the plant is used. The seeds, mixed with molasses, have been used as a parasiticide in getting rid of worms[257].

Known Hazards

Although no reports of toxicity have been seen for this species, skin contact with some members of this genus can cause dermatitis or other allergic reactions in some people[222].