Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois
By: Hermann W. Pfefferkorn.
Contributors: Illinois. Dept. of Registration and Education.
Series: Circular - Illinois State Geological Survey ;; 492; Circular (Illinois State Geological Survey) ;; 492.
Publisher: Illinois State Geological Survey
Published: 1976
Place of publication: Urbana
Language: eng
Number of pages: 31
Subjects: Ferns, Fossil.; Paleobotany -- Pennsylvanian.; Paleobotany -- Illinois.
Other titles: Pennsylvanian tree fern compressions ...
Notes: Bibliography: p. 16-18.
Cover title.
At head of title: State of Illinois. Department of Registration and Education.