90 



The Lower Cretaceous Deposits of Maryland 





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PiLICALES 

































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Dryopterites dentata 























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Onychiopsis latiloba 

















7 



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OnychiOpsis psilotoides 

















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Onychiopsis irevifolia 



















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Onychiopsis Ooepperti 













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Onychiopsis nervosa 







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Sagenopteris latifolia 















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Sagenopteris elliptica 

























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Sagenopteris virginiensis 





























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Tempskya Whitei ^ 









































Taeniopteris auriculata 



























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Taeniopteris nervosa 























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Scleropteris elliptica 

























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Thinnfeldia Fontainei 



























Thinnfeldia granulata 























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Thinnfeldia rotundilota 



























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Thinnfeldia marylandica 







































Lycopodiales 

 Selaginella marylandica 











































Equisetales 

 Equisetum, Lyelli 







7 



























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Equisetum Burchardti 









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Ctcadophytae 

 Cycadeoidea marylandica ^ 

































Cycndeoidea Tysoniana 











































J Found eroded out of Patapsco formation along Deep Run and Stony Run and on Patuxent Neck. 



2 This species occurs in situ in the Patuxent formation near Arbutus. Localities for other species of 



