The American ferns of the group of Dryopteris opposita contained in the U.S. National Museum
By: by Carl Christensen
Publisher: Smithsonian Institution
Published: 1909
Place of publication: City of Washington
Language: eng
Number of pages: 396
Subjects: United States National Museum
Notes: Cover title.

"From Smithsonian miscellaneous collections (quarterly issue) volume 52, part 3. No. 1867. Published July 12, 1909."

Includes bibliographical references.

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