I have an Echinopsis pachanoi (San Pedro Cactus) in bloom with 6 or 7 flowers currently open. This evening at sunset I was walking close by the cactus and heard buzzing. When I got near a flower at eye level I was amazed that there were about a dozen bees down in the flower tube along with a couple of tiny green wasps. They were in a pollen frenzy, when one would leave another would take it's place. It was hard to get a good picture because they were well down inside of the flower and the flowers don't completely open up until it's dark.. I assume that the crowd of bees may have been because it was in the 90' today and right now it's in the high 70's. Then again maybe there is some truth to the rumor that this plant has some serious narcotic properties. Anyway enjoy the flower and the bees.