Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Asterotheca lepidorachis, A. oreopteridia, A. cranulata, Ptychocarpus unitus, Pecopteris bucklandi, P. cisti, and P. arguta, page 53.
Note: the scan of the original page 53 is here.
The original page was letter size but the image may have been cropped slightly. 
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Asterotheca lepidorachis.
Asterotheca lepidoachis, GL photograph, page 53
 Ptychocarpus unitus.
Ptychocarpus unitus, GL photograph, page 53
 Pecopteris bucklandi.
Pecopteris bucklandi, GL photograph, page 53
Asterotheca oreopteridia.
Asterotheca oreopteridia, GL photograph, page 53
Pecopteris cisti.
Pecopteris cisti, GL photograph, page 53
 Asterotheca cranulata.
Asterotheca cranulata, GL photograph, page 53
Pecopteris arguta, GL photograph, page 53


Pecopteris arguta
(at left)