Traite Pal. Veg. vol.2. p. 236. pl. 78. figs. 1,2? 
1885 Walchia piniformis Renault 
Cours bot. foss. vol. 4. p. 84. pl. 8. figs. 1-8. 
1892 Walchia piniformis Zeiller 
Bass. houill. Perm. Brives p. 97. pl. 15. fig. 1. 
1893 Walchia piniformis Potonie 
Fl. Rotl. Thuringen p. 218. pl. 31. figs. 4, 6. 
1906 Walchia piniformis Zeiller 
Bass. houill. Perm. Blanzy et Creusot p. 204. 
pl. 50. figs. 3, 5. 
1908 Walchia piniformis Sellards 
Univ. Kans. Geol. Surv. vol. 9. p. 460. pl. 66. 
figs. 1, 2. 
1929 Walchia piniformis White 
Fl. Hermit Shale p. 96. pl. 41. figs. 1-5. pl. 42. 
figs. 1-5. pl. 47. fig. 2. 
There are many excellent published figures of this 
species. I have selected several to indicate the variety 
of coniferous shoots which have been included within a 
single ‘‘species’’. With the exceptions of the first three 
monographs, the references are generally available in 
large libraries. 
The two specimens from western Pennsylvania are, 
for the present, best referred to this poorly defined spe- 
cies, which as White’ says “‘is an aggregate of similar 
forms rather than a single species.’” One specimen is 
from the Clarksburg member of the Upper Conemaugh 
at Rennerdale, Allegheny County, Pennsylvania. The 
other is from the Nineveh coal group in the Greene at 
Mount Morris, Greene County, Pennsylvania.’ 
The specimens may be described as follows: twigs 
short; clothed with persistent, incurved, spirally dis- 
*Flora Hermit Shale p. 97 
“Penna. Top. & Geol. Surv. Bull. C-30. p. 100. 1932 
[11] 
