Allergen profile

Allergen: Couch grass Family name: Grasses Scientific name: Agropyron repens (L.) P. B. Family name latin: Poaceae   Description: A spiked, runner-forming grass up to 150 cm high; in contrast to ryegrass the seed heads face the rachilla with their broad side; perennial; flowering season: VI - VIII; roots up to 80 cm deep; nitrogen indicator;   Occurence: Frequent on wasteland, along paths and cultivated fields (a feared field weed, especially in former times), however only rarely forming dense stands; occurs in three subspecies;   Related species: Agropyron caninum (L.) P. B., bearded couch; widespread, but rare in North and North-West Germany (VI - VII); Agropyron junceum (L.) P. B. ssp. boreoatlanticum Sim. & Guin., sand couch; widespreach on coastal dunes (VI - VIII);   Allergy trigger: Pollen, 30 - 40 µm;   Invasions path: Inhalative (June - August);   Synonyms: Elymus repens (L.) Gould;   Allergology: Allergenic relevance has so far been insufficiently researched, however it surely does not belong to the most important allergens;   Exposure from: June   Exposure to: August   Clinical relevance: light   Cross reactivities: Occurrence possible Johnson grass (Sudan grass) Timothy Blue grass, (Kentucky)