SECOND GEOLOGICAL SURVEY OF PENNSYLVANIA - REPORT OF PROGRESS
P. DESCRIPTION OF THE COAL FLORA OF THE CARBONIFEROUS FORMATION
IN
PENNSYLVANIA AND THROUGHOUT THE UNITED STATES - VOL.III
BY LEO LESQUEREUX; ©1884
"Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois"
by George Langford (1876-1964)
Leo Lesquereux, Plate XCVII, No.6

Odontopteris aequalis. Shown at approximately the same size as in George Langford, Sr.'s photographs and 1/1 sketch at right.
Leo Lesquereux, Vol.III, Plate XCVII, No.6.
Odontopteris aequalis, George Langford, Sr.

Odontopteris aequalis.

Photograph of collected fossils (left and below) and sketch of vein structure (bottom.) Scale bar = 1 inch.
Odontoperis aequalis, George Langford, Sr.
George Langford, Sr.: page 64.
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