Conyza or fleabanes are upright annuals from America. Flowers produced in summer on branched inflorescences form a terminal pyramid-shape. Also known as Hairy Fleabane, Asthmaweed, South American Horseweed, South American Conyza. Widespread weed, risk: medium.

Grey-hairy herb, usually not much more than a metre tall, best distinguished by its stem which branches below each pyramid of inflorescences, resulting in a candelabra shape.

Photo: Robert Whyte

Flower closeup

Conyza bonariensis is found throughout the tropics and subtropics as a weed. Its precise native origin is unknown, but most likely Central America or South America. The species name “bonariensis” suggests it is from Argentina.

Photo: Robert Whyte

Flower closeups with insects

Other fleabanes include Tall Fleabane C. sumatrensis, C. canadensis var. pusilla and C. canadensis var. canadensis. This photograph was taken at Walton Bridge Reserve, The Gap.

Photo: Robert Whyte