1. “Endangered and Threatened Plants of the United States.”;Ayensu,1978
2. Some rare New Jersey plants;Bassett;Gard. For.,1897
3. A preliminary catalogue of the flora of New Jersey;Britton;Annu. Rep. State Geol.,1881
4. Catalogue of plants found in New Jersey;Britton;Geol. Surv. of N.J., Final Rep. State Geol.,1889
5. “The Ferns of New Jersey.”;Chrysler,1947