Herbaceous Plants of Maryland. Brown & Brown. 1984.

Vascular Plants of the Northeastern United States and Adjacent Canada Gleason & Cronquist. 1991.

Hammond, H. Davis. 1992. Corrections and additions for and errors found in the Manual of Vascular Plants of Northeastern United States and Adjacent Canada, Second Edition, by Henry A Gleason (late) and Arthur Cronquist. Bulletin of the Torrey Botanical Club 119(1): 88-89; 1992.

Bennett, James P. 1996. Floristic Summary of Manual of Vascular Plants of Northeastern United States and Adjacent Canada, Second edition. The Botanical Review 62(2):203-206.

Flora of the Carolinas. Radford, Ahles & Bell.

Freeman, John D. 1994. Text Annotations and Identification Notes for Manual of the Vascular Flora of the Carolinas. SIDA, Botanical Miscellany 11: I-iv, 1-54. Sida/Botanical Research Institute of Texas, 509 Pecan St., Fort Worth, TX 76102-4060, USA (telephone 817/332-4441; fax 817/332-4112) ISSN 0833-1475 Paper $20.00 plus $1 postage and handling.

Dr. Cooney's Changes in Scientific Names in Newcomb's according to Gleason & Cronquist

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