Maryland Geological Survey 157 



Ctenopteris longifolia 

 Ctenopteris insignia 

 Ctenopsis latifolia 

 Nilsonia densinerve 

 Dioonites Buchianus 

 Zamiopsis petiolata 

 Zamiopsis laciniata 

 Zamites crassinervis 

 Podozamites incequilateralis 

 Podozamites distantinervis 

 Baiera foliosa 

 Gephalotaxopsis magnifolia 

 Cephalotaxopsis brevi folia 

 Cupressinoxylon Wardi 

 Cupressinoxylon McGeei 

 Arthrotaxopsis expansa 

 Arthrotaxopsis grandis 

 Frenelopsis ramosissima 

 Brachyphyllum parceramosum 

 Laricopsis angustifolia 

 Cedrus Leei 

 Sequoia rigida 

 Sequoia delicatula 

 Protecephyllum reniforme 

 Protecephyllum ovatum 

 Rogersia longifolia 

 Rogersia angustifolia 

 Rogersia angustifolia parva 

 Ficophyllum serratum 

 Ficophyllum oblongifolium 



Forty-one Patuxent-Arundel species are known to persist in the Pa- 

 tapsco flora, while the following Patapsco species are unknown in either 

 the Patuxent or Arundel floras : 



Acrostichopteris longipennis 

 Knowltonella Maxoni 

 Dicksoniopsis vernonensis 

 Dryopterites pinnatifida 

 TempsTcya WMtei 

 Selaginella marylandica 

 Dichotozamites cycadopsis 

 Podozamites Knowltoni 

 Araucarites aquiensis 

 Arauearites patapscoensis 

 Abietites marylandicus 

 Pinus vernonensis 



