Pollen removal after single bee visits in the field
These data are pollen counts from anthers before and after single bee visits in populations of Chamerion angustifolium from Montana. Pollen was quantified with a Beckman-Coulter Multisizer 3 particle counter.
Population: The population sampled, either tetraploid or diploid.
Sample: An identification code representing the plant and flower sampled.
StigmaPresence: Some flowers had their stigma and style removed with forceps. Others were left intact.
Visitation: Whether the anther was sampled before or after a single bee visit.
PollenCount: The estimated amount of pollen present in the flower.