The Comma has a white marking on its underwings resembling a comma. The wings have a distinctive ragged edge, apparently a cryptic form as the butterfly resembles a fallen leaf.
tropical forest on limestone
I spotted this in Ba Be Lakes National Park. It was very difficult to photograph. I cropped it and zoomed in for a better view. It was on a steep hillside and I was leaning way over to photograph it. Looks like it's on some sort of Ageratum.