Sun-Tracking Solar Furnaces in High Arctic Flowers: Significance for Pollination and Insects

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Science  29 Aug 1975:
Vol. 189, Issue 4204, pp. 723-726
DOI: 10.1126/science.189.4204.723


Heliotropic flowers (Dryas integrifolia, Papaver radicatum) act, in sunshine, as solar reflectors, their corollas focusing heat on the sporophylls. Considerable intrafloral temperatures are generated. Winds above 3.8 meters per second and cloud abolish the effect. Insects that bask in the flowers also gain heat. The phenomena areimportant in maximizing the small heat budget.