The big round leaves are wild ginger, Asarum canadense. The mounds of pointy leaved plants (word of the day: acuminate = pointy leaved) are Virginia snakeroot, Aristolochia serpentaria. It is the larval host plant for the Pipevine swallowtail butterfly. I have only been found by Pipevine swallowtails once, two years ago. My little neighbor girls discovered the caterpillars and were thrilled. I sent one of them off to school with the cat in a jar and the butterfly book to show her class. She told me the caterpillar spun a cocoon while in her care. I never heard its ultimate fate.