Anthecological relations between reputedly anemophilous flowers and syrphid flies. VI. Aspects of the anthecology of Cyperaceae and Sparganium erectum L.

Cyperaceae and Spargcmium erectum L. are occasionally visited by representatives of syrphid species of the Melanostoma-Platycheirus group. Analyses of the content of crop and gut revealed that some of these flies feed for some time (almost) exclusively on the pollen of Cyperaceae and S. erectum, which leads to the conclusion that zoophilous pollination occurs occasionally.