Box 25, Folder 4: Ferns III

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Genus Alethopteris
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Genus Alethopteris

5-Felices 3 Pecopteridae

Genus Alethopteris, Sterhb? & Gopp.

Frond bipinnate or tripinnate or by tripinnatifid; secondary nerves rising perpendicularly or obliquely from the medial one, simple or dichotomous, and many times forked; margins of the pinnules often revolute; front unknown.

Last edit 11 months ago by EricRoscoe
Alethopteris Aquilina
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Alethopteris Aquilina

Alethopteris Aquilina Gopp. Esq. Geol. Penn 2p 864-Pecopteris aquilina Brongt

Frond bipinnatifid; pinnules very open, close, oblong, obtuse, united at the slightly decurrent base, or sometimes separated to the rachis; terminal leaflets oblong obtuse; secondary nerves perpendicular to the medial one, either bifurcate or with the nervules simple.

Coal Meannes U. States?

Last edit 11 months ago by EricRoscoe
Pecopteris Lonchititca
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Pecopteris Lonchititca

[Sketch: Pecopteris lonchitica].

Last edit over 1 year ago by EricRoscoe
p. 1
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p. 1

[Sketch: Alethopteris distans].

Last edit over 1 year ago by EricRoscoe
p. 2
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p. 2

Alethopteris distans, Lesquereux Geol. Penn 2p 865 pl 12 fig 2

Frond bipinnated; prime open linear=lanceolate; pinnules alternate, linear distant, crenulate, enlarged but distinct at the base; united only in the upper part of the terminal pinnae where they become broader, shorter, and obtuse; secondary nerves obsolete.

Coal Meannes Muddy Creek Pennia.

Last edit 11 months ago by EricRoscoe
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