Stamen movements in flowers ofOpuntia (Cactaceae) favour oligolectic pollinators

@article{Schlindwein2004StamenMI,
  title={Stamen movements in flowers ofOpuntia (Cactaceae) favour oligolectic pollinators},
  author={C Schlindwein and Dieter Wittmann},
  journal={Plant Systematics and Evolution},
  year={2004},
  volume={204},
  pages={179-193}
}
Opuntia brunneogemmia andO. viridirubra occur sympatrically in the Serra do Sudeste, Rio Grande do Sul, Brazil. Their flowers have 450–600 thigmonastic stamens and provide large amounts of pollen and nectar for bees. Bees of 41 species were registered at the flowers ofO. brunneogemmia and 30 at the flowers ofO. viridirubra. Females of three oligolectic species are the only effective pollinators:Ptilothrix fructifera (Anthophoridae),Lithurgus rufiventris (Megachilidae), andCephalocolletes rugata… CONTINUE READING
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