Maryland Geological Survey 191 



Panax cretacea Heer 

 Pecopteris bohemica Corda 

 Pecopteris borealis Brongniart 

 Pecopteris pfafflana Heer 

 Pecopteris striata Sternberg 

 Phegopteris jorgenseni Heer 

 Phyllites granulatus Heer 

 Phyllites incurvatus Heer 

 Phyllites Iwvigatus Heer 

 Phyllites linguwformis Heer 

 Phyllites longepetiolatus Heer 

 Pinus olafiana Heer 

 Pinus staratschini Heer 

 Pinus (Abies) upernivikensis Heer 

 Pinus vaginalis Heer 

 Pistia nordenskioldi (Heer) Berry 

 Platanus heerii Lesq. 

 Podozamites latipennis Heer 

 Podozamites marginatus Heer 

 Podozamites minor Heer 

 Podozamites tenuinervis Heer 

 Populus amissa Heer 

 Populus berggreni Heer 

 Populus hyperborea Heer 

 Populus stygia Heer 



Protophyllocladus subintegrifolius (Lesq.) Berry 

 Pseudocycas dichsoni (Heer) Nathorst 

 Pseudocycas insignis Nathorst 

 Pseudocycas pumilio Nathorst 

 Pseudocycas steenstrupi (Heer) Nathorst 

 Pteris ? albertsii Dunker 

 Pteris frigida Heer 

 Pteris gronlandica Heer 

 Pteris longipennis Heer 

 Pterospermites auriculatus Heer 

 Pterospermites cordifolius Heer ■ 

 Quercus ferox Heer 



Quercus (Dryophyllum) hieracifolia (Debey) Hoslus and v. d. Marek 

 Quercus rinkiana Heer 

 Quercus thulensis Heer 

 Quercus troglodytis Heer 

 Quercus warmingiana Heer 

 Quercus westfalica Hosius and v. d. Marck 

 Rhamnus acuta Heer 



1 Recently referred to ~Nuphar by Fritel, Bull. Soc. Geol. Fr. (iv), t. xiii, pp. 

 293-297, 1913. 



