Pecopteris

About it

Tree fern foliage with small, parallel-sided leaflets attached along their whole base, each with a straight midvein. Common in Pennsylvanian coal-measure shales and Mazon Creek nodules.

Type

Fossil (plant)

Group

Fern (plant)

Colours

black, brown, silvery white

Transparency

opaque

Periods

Carboniferous, Permian

Typical values: real specimens vary. For more, see mindat.org.