Box 25, Folder 4: Ferns III

Alethopteris nervosa Gopp Syst. p 312-- Lesq. Geol Penn 2 p 865 pl 18 fig 3.

Frond bi-pinnate or tripinnate; pinnae and pinnules nearly open; pinnules entire, oblique, oblong, lanceolate, or oval, enlarged at the base, decurrent and united together; terminal pinnule oval, or linear-oblong, the inferior of each pinna bilobate; secondary nerves distinct, oblique on the medial nerve, the inferior ones forking, the superior entire, thick

Coal Measures Pottsville, Shamokin &c Pa.

[Sketch-Pecopteris Serlii].

Alethopteris Serlii, Gopp. Syst p 301 t 21 Lesq. Geol. Penn 2 p 865

Pecopteris Serlii, Brongmart Hist. Veg. [?] pl. 85; Teschemacher, Bost. Jour. Nat Hist vol 5 p 380 pl 35.

Bipinnatifid; pinnules oblong oblique, enlarged and decurrent at the base, obtuse or slightly acute; terminal leaflet lanceolate; secondary nerves nearly perpendicular to the medial one, very numerous & thin, close, dichotomous.

var a -- pinnules obtuse var b pinnules slightly acute

Coal Measures Penn. Va. Ohio, Cape Breton

Carboniferous

Mansfield, Mass Wrentham & Mansfield R.I. Sidney, Cape Breton. Tallmage, Summit Co. Ohio. Willkesbarre Pa

Also in Europe

Alethopteris uraphylla Gopp -- Lesq. Geol Penn 2 p 864 -- Pecopteris uraphylla Brougt.

Frond 2-3-pinnatifid; pinnatifid only above; terminal pinnae linear, very long, entire, decurrent; inferior pinnae deeply pinnatifid, terminated in a linear elongated leaflet; lateral pinnules united at the base, oblong linear, slightly obtuse; secondary nerves very thin simple or dichotomous, slightly oblique.

Coal Measures Pottsville Pa