This hybrid rose plant was found outside of Avery House at Caltech. The picture and the sample were taken at 4:45 pm on May30th. I obtained the sample by rubbing the central part of the plant onto the slide.
The pollen is composed of relatively large round grains. The pollen is really similar to the pollen of iceberg rose, posted earlier. The pollen seems to have a more dense center and less dense outer edge.
#caltechbi1