Rhododendron

Here's an odd one. Summer of 2008 I took a class with Marlene Ahmann. She's a fantastic local artist, inspired frequently by Zoltan Szabo. Taught us a lot about negative shapes. For this exercise we were told to find something outside we liked and paint it, using negative shapes and light. I loved the way the sun lit up this gnarled and ancient rhododendron. I never really finished it, but it's grown on me as-is. What do people think? What does it need?