p. 2

Pecopteris decurrens Lesquereux
Geol. Penn 2 p 867 pl 11 fig 5a.

Frond bipinnate; pinnae
opposite, the superior ones terminal
by the forking of the rachis; pinnules
distant, oval-oblong, obtuse, entire,
contracted at the base on the upper
side; dilated on the lower, & decurrent
on the rachis, which is broadly
winged; medial nerve undulate,
scarcely thicker than the lateral ones,
which are simple, or sometimes
forked and arched; primary rachis
flattened and broad, enlarged at the
articulations of the pinnae, striate,
and roughened by very small
glandular points.

Coal Measures
Pottsville Pa