Photo: Helianthus annuus 06.

Photo: Helianthus annuus 6.

Flowering field in the evening. Once the flowers are heavy enough they stop following the sun, instead turning towards sunrise. Juva, Finland. Planted. 1999-07-22.

Helianthus annuus L.
Engl.: sunflower, common sunflower.
Deu.: Sonnenblume.
Suom.: auringonkukka, isoauringonkukka.
Sven.: solros.
Bot. syn.: Helianthus aridus Rydb., Helianthus lenticularis Dougl. ex Lindl.