Kind of like "Comedians in Cars Getting Coffee", I have been "interviewing" trees in parking lots by sketching their "character". This works well if I arrive early to an appointment or event. And, hey, if the appointment doesn't go well, at least I sketched a tree!
The picture above is a very regal sycamore tree in the parking lot at the North Museum, Franklin & Marshall College, Lancaster, PA. That tree was sketched with a Pentel Pocket Brush with a bit of watercolor added on the spot. The tree on the right is a tree in the parking lot at Monocacy Hill, a wooded preserve in Berks Co., PA. It was done with a Pigma Micron Pen 05 and later a bit of Prismacolor Verithin colored pencil was added.