This is where the sample was obtained. The location was at the corner of Holliston Ave and San Pasqual St, specifically at the area marked in blue in the map below. The time it was obtained was May 29, 2019 at 12:13 AM.

The sample was retrieved from inside of the small white flower. These two images are magnifications of the pollen. It has the square-ish structure in the center.
#caltechbi1