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Table 3 Floral visitors and their rewards

From: Floral biology, breeding system and pollination ecology of an endangered tree Tetracentron sinense Oliv. (Trochodendraceae)

Order Family Species Reward
Coleoptera Cerambycidae Parastrangalis sp. Nectar
   Pidonia sp. Nectar
Diptera Syrphidae Eristalis tenax Linnaeus Pollen, nectar
   Syrphus vitripennis Meigen Pollen, nectar
   Allograpta nigritibia Huo Pollen, nectar
   Cheilosia sp. Pollen, nectar
   Palumbia sinensis Curran Pollen, nectar
   Sphaerophoria sp. Pollen, nectar
Hymenoptera Apidae Xylocopa sinensis Smith Pollen, nectar
   Haborpoda sp. Pollen, nectar
  Vespidae Vespa sp. Pollen, nectar