Sweet Gum (Liquidambar styraciflua) is an ubiquitous tree of Maryland’s coastal plain. The seed pods and five pointy-lobed leaves are very distinctive and often cover the ground wherever the trees are present. Check out the Sweet Gum species page at the Maryland Biodiversity Project: http://www.marylandbiodiversity.com/viewSpecies.php?species=1374
Top photo by Jim Brighton.
Bottom photo by Bill Hubick.