The following list of lichens of Maryland is derived from the following sources:
- (1) lichens listed in the 1977 publication by Skorepa (Allen C. Skorepa), Norden [1], and Windler.
- (2) lichens listed in the 1979 publication by Skorepa, Norden, and Windler.
- (3) lichens listed in the 2002 publication by Biechele as occurring on Maryland's Delmarva Peninsula.
- (4) lichens in Elmer Worthley's personal herbarium.
- (5) lichens found in Maryland by Edward Uebel.
- (6) lichens reported on Maryland's Delmarva Peninsula by Lendemer and Knapp (2007) at six locations: 1. Millington State Wildlife Management Area (1. Millington); 2. Idylwild State Wildlife Management Area (2. Idylwild); 3. Chesapeake State Forest (3. Chesapeake); 4. Sharptown Dunes (4. Sharptown); 5. Hickory Point Cypress Swamp (5. Hickory Pt.); 6. Pocomoke State Forest (6. Pocomoke).