Oakleaf Sumac ‘Autumn Amber’Autumn Amber Sumac (Rhus trilobata) delivers a tough as nails native groundcover with a splash of seasonal drama. This prostrate sumac hugs the ground and stays about one foot tall with spreading stems that weave a lush green carpet through spring and summer, then blaze into rich amber, orange, and red hues each fall. Its dense growth makes it ideal for erosion control on slopes and banks, while its deep roots thrive on neglect and minimal irrigation