BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CampripGk, Massacnusetts, JUNE 29, 1935 VoL. 3, No. 9 
PERMIAN ELEMENTS 
IN THE FOSSIL FLORA OF THE 
APPALACHIAN PROVINCE. | I. 
TAENIOPTERIS 
BY 
Winriam C. DarRRAaH 
INTRODUCTION 
THE LATE Docror Davin Wuire studied the floras 
of supposed Permian age in Pennsylvania and West Vir- 
ginia for more than thirty years. His observations’ essen- 
tially substantiated those of Fontaine and I. C. White’ 
who published the only comprehensive survey of the 
flora of the Dunkard Group. This fossil flora contains a 
complex intermingling of Carboniferous, Permian and 
‘“Priassic’’ plants. More precisely the last group are 
plants of ‘‘Mesozoic implication.’* Most investigators 
have followed the conclusions of David White and of 
Fontaine and White, and have regarded the Dunkard 
rocks to be of Permian age. That there is a true Permian 
flora in the Dunkard is incontestably demonstrated by 
the presence of Callipteris. However, this important in- 
dicator makes its appearance at the base of the Greene or 
Upper Dunkard. In astrict sense the Permian division- 
"Bull. Geol. Soe. Am. vol. 14. pp. 538-540. 1904 
2 7 . . 
Permian Flora; Harrisburg 1883 
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