| Rhode Island's Foliose and Fruticose Lichens |
| Flenniken, Don. 2003. Rhode Island's Foliose and Fruticose Lichens with Emphasis on the Nature Conservancy Preserves and Related Lands. Rhode Island Natural History Survey, Kingston, RI. |
Room 101, The Coastal Institute in Kingston, 1 Greenhouse Rd, URI, Kingston, Rhode Island 02881-0804; www.rinhs.org |