SECTIOXS ALONG RICH:\rOXD, FREDERICKSBURG AND POTOMAC R. R. 83 



Tlie plant remains from this locality include the following, about half 

 of which are Dicotvledona : 



Araliaephylluvi magnifolium Font. 

 Araliaephyllum erassinerve (Font.) 

 Aristolochaephyllum erassinerve Font. 

 Arthrotaxopsis grandis Font. 

 Brachyphyllnm crassicaule Font. 

 Celastrophyllum acutidens Font. 

 Celastrophylluni parvifolium (Font.) 



Berry 

 Cladophlehis Brojvniana {Dunk.) Seward. 

 Cladophlchis crenatu Font. 

 Cladophlehis constricta Font. 

 Dryopteris rirginica Font. 

 Hederaephyllum dentatum (Font.) Berry 

 Myrica brookensis Font. 

 Myriaaephyllum dentatv/m Font. 

 Nageiopsis angustifolia Font. 

 Nageiopsis longifolia Font. 

 Nclumhites rirginiensis (Font.) Berry 



Onychiopsis Goepperii (Schenk) Berry 

 0)iychi<)psis psilotoides (Stokes and 



Webb) Ward 

 J'opulophyllum grossedentatum Font. 

 i^apindopsis brevifolia Font. 

 Hapindopsis magnifolia Font. 

 Sapindopsis variabilis Font. 

 Sassafras bilobata Font. 

 I>iassafras parvifolium Font. 

 Dichotozaniites cycadopsis Font. 

 Hphenolepis Kurriana, (Dunk.) Schenk 

 Sphenolepis Sternbergiana ( Dunk. ) Schenk 

 Thinnfeldia Fontainei Berry 

 Torreya virginiea Font. 

 Ulmophyllum brookense Font. 

 Widdringtonites ramosus (Font.) Berry 



X. Section near Brooke. 



Feet 

 Eocene. Aquia Argillaceous glauconitic sand about 40 



Lower Cretaceous. Patapsco Light gray massive arkosic coarse sand with 



pebbles, clay balls and clay lenses with leaf 

 impressions indurated in the lower part 

 about 20 



Total about 60 



The plant rrinains from near Brooke include: 



Acrostichopteris longipennis Font. 

 Acrostiehopteris pluripartita (Font.) 



Berry 

 Araucarites aguiensis Font. 

 Carpolithus brookensis Font. 

 Cladophlebis Broioniana (Dunk.) Seward 

 Dryopteris eUipticum Font. 

 Dryopteris pinnatifidum Font. 



Xageiopsis angustifolia Font. 

 Kelumbites virginiensis ( Font. ) Berry 

 Podozamites acutifolius Font. 

 Sapindopsis brevifolia Font. 

 Sapindopsis magnifolia Font. 

 Sapii)dopsis variabilis Font. 

 Sphenolepis Kw riana ( Dunk. ) Schenk 



The following table shows the geographical distribution in the Virginia 

 area of the various meml^ers of the Potomac flora. 



