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Allergen profile
Allergen:

Orach
Family name:

Goosefoot family
Scientific name:

Atriplex L.
Family name latin:

Chenopodiaceae
 
Description: Reaching a height of 20 to 150 cm, these annual herbs are sometimes silvery-mealy and make a patulous (widespreading) impression; leaves elongated to a point, usually serrated or sinuate (cleft); flowers greenish, inconspicuous, clustered, in false spikes; entomogamous and autogamous; flowering season: VI - X; occasionally some species are cultivated as vegetable plants.
 
Occurence: Widespread in ruderal areas, paths, fields, town squares and on sandy, salty and silty soils along sea coasts; the species A. lentiformis is native to the moderate and tropical zones of North America .
 
Related species: Species of the Chenopodiacae families Salsola (glasswort), Salicornia (glasswort), Kochia (burning bush), Halimone, Spinacia (spinace), Chenopodium (goose-foot) and Beta (beet); all species with very simular distribution concentrations and a flowering season from VI - X;
 
Allergy trigger: Pollen, approx. 20 µm;
 
Invasions path: Inhalative (June - October);
 
Allergology: Because of the relatively small amount of pollen released it is only of minor importance as an inhalative allergen; since it is a member of the chenopodiaceae and a close relative to the amaranthaceae it forms an antigen community with these families.
 
Exposure from: June
 
Exposure to: October
 
Clinical relevance: light