Gymnogramme Triangularis.
Boston: S. E. Cassino, 1880. Color lithograph. Page size 12-1/2 x 9-1/2 inches. Plate XLVIII from The Ferns of North America: Colored Figures and Descriptions, with Synonomy and Geographical Distribution of the Ferns (Including Ophioglossaceae) of the United States of America and the British North American Possessions by Daniel Cady..... More