Plate XLV. CYCADOFILICALES, CORDAITALES, 

 AND FERN STEMS 



An extinct class of Paleozoic Gymnosperms is named 

 Cordaitales in honor of the great paleobotanist Corda. 

 Leaves, stems, and the reproductive organs have been 

 found. The leaves belong to the genus Cordaites, the male 

 reproductive organs to Cordaianthus and the seeds to 

 Cardiocarpus. Specimens are illustrated in Plate XLV, 

 figs. 2 and 3. 



1. Staphyllopteris sagittatus Lesquereux, from Mazon Creek, 



K Coll. 



2. Cordaites grandifolius Lesquereux, from Mazon Creek, x 1/2, 



U C Coll. No. 32071. 



3. Cordaianthus gemmifer Grand ' Eury, from Mazon Creek, U C 



Coll. No. 32072. 



4. Megaphyton spec, from Braidwood, x 3/1, U C Coll. No. 32073. 



5. Ptychopteris spec, from Coal City Willmington Star Coal Mining 



Co., Mine No. 7, x 3/1, Property of Mining Company. 



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