The Leucanthemum vulgare is considered in some places to be an invasive species. That does not prevent one from taking a closer look at the spiraling floret of the ox eye daisy.
This leaky pattern is created by water flowing through a crack in the concrete. The dissolved calcium hydroxide is brought to the surface where it hardens.
The two works on this brick wall by Mark Rothko complete the complex pattern presented by the air conditioner, the two grated windows, a row of mailboxes, a bag of garbage, and the sidewalk.