Syn.: Galinsoga parviflora var. quadriradiata (Ruiz et Pav.) Poiret, Galinsoga ciliata (Raf.) S. F. Blake, Galinsoga caracasana (DC.) Schultz, Galinsoga aristulata E. P. Bicknell, Galinsoga urticaefolia (Knuth) Bentham
Family: Asteraceae Bercht. et J. Presl
Galinsoga qudriradiata
Distribution: Native to the Andes in South America. Recently it’s been distributed to the temperate and subtropical zones of almost the whole world. In the Czech Republic it grows in almost the whole country from plains to mountainous areas. It was first observed in late 19th century.
Ecology: It grows mainly in anthropomorphically affected places e. g. fields, gardens, fallows, ruins and railway embankments. It prefers light and slightly moist places and neutral to slightly acidic soil rich in nutrients. Flowers from June to October.
Description: An annual, 20–60 cm tall herb. The stem is straight, branched, rounded, hairy. The leaves are opposite, petiolate to almost sessile, broadly ovate to lanceolate, up to 6 cm long and 4,5 cm wide, serrate and hairy. The inflorescence is dichasium composed of capitula. Each capitulum is 5–8 mm in diameter and consists of 20–60 tubular florets and mostly 5 ray florets. The rays are of the same lenght or longer than 1/2 the diameter of the disc, white, with 2 notches at the end. The fruit is an achene.
Galinsoga qudriradiataGalinsoga qudriradiata
Galinsoga qudriradiataGalinsoga qudriradiata
Galinsoga qudriradiata
These images were taken in Czechia, Soběšín (date: 4. 9. 2005).