TWO NEW FOSSIL PLANTS FROM THE TRIASSIC OF 

 PENNSYLVANIA. 



By Edgar T. Wherry, 



Assistant Curator, Division of Mineralogy and Petrology, 

 United States National Museum.. 



I. A NEW CONIFER FROM CARVERSVILLE. 



The occurrence of fossil plants at Carversville, Bucks County, 

 Pennsylvania, was first made known by Prof. Ainos P. Brown in 

 1911.^ In addition to the two cycads and four conifers described by 

 Professor Brown,^ fragmentary remains of several other species of 

 both classes are present at the locality, and one conifer, collected by 

 the writer in 1912, is sidhciently well preserved to justify description. 

 It bears some resemblance to a plant which has been found in the 

 Triassic of other parts of this country, and assigned to PaUssya 

 sphenolepis (Friedrich Braun) Brongniart,^ but its leaves are too long, 

 slender, widely spaced, and with too obscure a midrib for it to be 

 identified with that or any other previously known form. It appears 

 to belong, however, to the same genus,* and is accordingly described as: 



PALISSYA LONGIFOLIA, new species. 



Plate 29. 

 Description. — Stem 6-8 mm. in diameter, striate, with subopposite 

 leafy branches 2-2.5 mm. in diameter at intervals of 5-6 cm., and 

 with scattered leaves between the branches. Leaves of main stem 

 and branches ahke, 2-3 cm. long, 1.5-2.5 mm. wide, separated by 

 interspaces of about their own width, inclined at 45-60°, subopposite; 

 linear in outhne, gradually and shghtly contracted at the base and 

 somewhat decurrent; toward terminations narrowed shghtly, but 



1 Proe. Acad. Nat. Sci., Phila., 1911, p. 17, pis. 1-5. 



2 Podozamiies formosus Brown, Zamiles velderi Brown, Cheirolepis muensterl (Schenk) Schimper, C. latus 

 Brown, Pallss'ja diftusa (Emmons) Fontaine, and P. oblusa Brown. 



3 In York Coimty, Pa., Ward, Status of the Mesozoic floras of the U. S., 20th .\nn. Rept. U. 8. Qeol. 

 Survey, pt. 2, 1900, p. 249, pi. 32; and in North Carolina, Fontaine, idem., p. 30J, pis. 41-45. 



« Differing from VoUzia in having the leaves all alike, and from AJ'jcrlia in the leaves being much longer 

 than broad and in the presence of a distinct (though faint) midrib. 



Proceedings U. S. National Museum. Vol. 51— No, 2154. 



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