Architecture of Ambrosia psilostachya DC. Individuals in different habitats

Abstract

Ambrosia psilostachya is a plant of North American origin, well-domesticated in Poland. It covers ruderal habitats and is found in crops and in city green areas. The density of ragweed shoots in the researched areas ranged from 55 to 111 per m2. The production of biomass of this species relates to the production of synanthropic communities and city lawns. The factor limiting the population is cutting which affects mostly the number of shoots per patch, less considerably the state of a single individual. Habitats affected by mechanical factors are the biggest source of pollen causing allergies .

Keywords

• Ambrosia psilostachya
• biomass
• morphology
• dispersion
• male inflorescence
• Bydgoszcz