Syrphids as visitors of the reputedly anemophilous Rumex alpinus (Polygonaceae)
Among reputedly anemophilous plant species a few groups were found which are to some extent insect-pollinated, namely by syrphid flies. In most cases syrphids have been observed on anemophilous monocotyledonous plants, such as grasses (Porsch 1956; Van der Goot and Grabandt 1970; Leereveld 1984), on Sparganium erectum (Leereveld 1984), Cyperaceae graminoids (Leereveld 1982), Typha angustifolia (Waitzbauer 1976) and Scirpus maritimus (Leereveld et al. 1981).
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