The bee-loved flowers above are sometimes called poached egg plant. Their official name is Limnanthes douglasii and their “more serious” common name is Douglas Meadowfoam. After trying various descriptions with Google search, “five white and yellow petals” finally yielded an image that looked like the flower I was looking for. Yay! I don’t have the motivation to figure out the bee species but if you happen to know, I would be happy if you shared your knowledge. I chanced upon these flowers in mid-May at the Strathcona Community Garden. The flowers also attract hoverflies which eat copious amounts of aphids.