Acer macrophyllum
Riparian trees on Permanente Creek include the State's tallest and third largest California bay laurel tree ("Umbellularia californica") - see Gallery below, estimated to be over 200 years old. Other riparian trees include Willow ssp. ("Salix ssp."), California sycamore ("Platanus racemosa"), white alder ("Alnus rhombifolia"), black cottonwood ("Populus trichocarpa"), Fremont cottonwood ("Populus fremontii"), bigleaf maple ("Acer macrophyllum"), California buckeye ("Aesculus californica") and California walnut ("Juglans californica").