Box 25, Folder 4: Ferns III

[Sketch- 1/2-Cyclopteris obliqua.]

Cyclopteris obliqua, Ad. Brongniat (C. auriculata Brong.)

Leaf auriculed at base; veins all radiate from the base, & dichotomous; no mid-rib; no trace of a foot stalk.

Carboniferous,

Wilkesbarre, Pa

Cyclopteris orbicularis Brongt. Hist. Foss. 1, p. 220, t. 61 fig. 12. Lesq. Geol. Penn 2 p 856

Leaves nearly round, slightly cordate, either symmetrical or oblique at the base, nerves very distant and strongly marked, dichotomous. The nerves are often one line apart.

Coal Measures Above Mauch Chunk Penn.

Cyclopteris trichomanoides Brongt. Lesq. Geol Penn 2 p 856

Leaves kidney-shaped or nearly round, either symmetrically or unequally cordate at the base; nerves very slender, distant radiate, dichotomous, becoming very thin and close at the margins. No hair on the surface

Coal Measures Pottsville Pa.