As a beekeeper I have long noticed how bees are attracted to the tree from sunup to sundown for about 4 weeks each summer. I estimated between 2 and 3 thousand bees in the tree all day long. The interesting thing about the tree is where I'm fairly certain it gets its common name. At the end of the 4-week nectar flow the flower petals start falling off. It is an amazing and surreal thing to stand under the tree in the middle of a gentle golden snowfall of tiny petals, each slowly falling to carpet the ground in yellow. One of my favorite trees!
NOTE: these pics were all taken in very bright incandescent lighting ("soft white" at 2700K)
colors will vary under other lighting conditions
to me as, the first one seems to be OK and the last one is slightly doubtful