Seeing in Lines

It has been a mild spring day rather than an end of winter day.  When I got home this afternoon I was struck by the outlines of the deciduous trees against the blue sky.  There has been more drawing happening in the art room and I think I'm brain washing myself to see drawing lines in everything.  In this pic are a pin oak tree, cabbage tree, five finger, flowering cherry, eucalyptus, camellia, rhododendron.