Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The biology of Canadian weeds. 56. Xanthium strumarium L.

Abstract

Xanthium strumarium is an annual weed found in all provinces of Canada except Newfoundland, and throughout the temperate and subtropical regions of the world. It occurs in ruderal habitats, waste places, agricultural fields and along watercourses, beaches and coastal dunes. Throughout its range, populations vary widely in fruit size and morphology and in photoperiodic requirements. It has been used extensively as an experimental plant in studies of floral induction, leaf development, stomatal control, seed germination and biological control.