Growing with bidens, asiatic dayflower and ailanthus.
The plant on the left with the small white and yellow flowers.
Taxon: Galinsoga ciliata (Synonym: Galinsoga quadriradiata - in Central Europe G. ciliata is preferred, elsewhere however the synonym)
2016-03-28 Portugal, Madeira, Câmara de Lobos (200 msm)
Native of Southern America, but nowadays a really cosmopolitic plant; and more or less invasive on Madeira.
German name: Zotten-Franzosenkraut
ID source: Grupo de Botânica da Madeira - Flora de Madeira: Galinsoga quadriradiata
Habitat: wet place near a levada
Galinsoga quadriradiata is a species of flowering plant in the daisy family which is known by several common names, including shaggy soldier, hairy galinsoga, and fringed quickweed. It is found throughout most of the temperate world, but apparently its native home is Mexico. In Portuguese-speaking countries where it is widely naturalized - e.g. in Brazil - it is known as botão-de-ouro. As an agricultural weed it can reduce crop yields by up to 50%.