Box 25, Folder 4: Ferns III

Sphenopteris tenella, Brongt. Veg. Foss. 1. p. 186, t 49, fig. 1. Lesq. Geol. Penn 2 p861

Frond tripinnate; pinnae & pinnules alternate, distant, petiolate, open; pinnules deeply pinnatifid; the inferior ones with two or three pairs of leaflets; the superior ones bi-trifid, with the divisions alternate, linear-lanceolate, acute; nerves pinnately branching; rachis filiform naked.

Coal measures Port Carbon Penna

Sphenopteris trifoliata

Carboniferous Wilkesbarre Pa

Sphenopteris? trifoliata, Hall, Fremonts' Report, p. 305 pl. 2 fig. 2

Frond bipinnate; pinnoe trifoliate; pinnules elliptic, narrowing at the base; rachis slender, flexuous; fructification terminal, racime-like, from the pinnules gradually becoming single and fructiferous; capsules apparently immenced in the thickened pinnule.-a beautiful & graceful species.

Carboniferous?

Lat 41 1/2 deg. Long 111-in light gray induraled clay.