The first two pictures are clusters of yellow pollen particles from a Chinese hibiscus flower, or a Hibiscus rosa-sinensis flower. The sample was collected at 3:25 pm on 5/8/19 outside of Page house near the olive walk entrance in Caltech. The locations is shown in the last picture. The sample was obtained by shaking the pollen from the flower’s anthers onto the slide. #caltechbi1