Box 25, Folder 4: Ferns III

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Alethopteris laevis, Lesquereux, Geol. Penn. 2 p 865

Differs from A. nervosa, Gopp. by its entirely smooth surface, with no trace of nerves.

Coal Meannes New Philadelphia Pa.

Last edit over 2 years ago by EricRoscoe
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[Crossed out].

Last edit over 2 years ago by EricRoscoe
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Alethopterus lonchitidis, Sternb Lesq. Geol. Penn. 2p 864

Frond 2-3-pinnate; pinnae open, alternate, the inferior ones bipinnatifid; the superior ones pinnatifid; pinnules open alternate, lanceolate=linear, long acute, slightly oblique, decurrent at the base, and united or distinct, convex on the margins; medial nerve broad, canaliculate, nearly excurrent; nervules perpendicular slender, close, simple or dichotomous.

Coal Measures: Cuyahoga Falls Ohio Kenawha Salines Va - Pottsville Pa Pictu & South Joggins Nova Scotia Zanesville O.

Last edit over 1 year ago by efaletti
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Althopteris lonchitidis Sternb. Lesg. Geol. Penn. 2 p 864

Pecopteris lonchitica, Bronguant Hist. Veg. Foss. pl. 84 Lin. HcH. Vol. 2 p. 197 pl. 153

P. blechnoides, Brongn. Alethopteris lonchiticus & A. vulgatior, Sternb. Filicutes lonchitious Schloth. See also Am. Jour. Sc. vol. 29 p. 34 & 105 pl. 4 fig. 8, pl. 18 fig. 47, & pl. 30 fig. 4. Ortripinate

Bifinnated; lobes long narrow, usually decurrent, contracting, however, at the base towards the lower part of the punoe; accute, acuminate, or rather obtuse; towards the end of the pinnoe they become confluent, diminishing very much in size, and at last ending in a long lobe, resembling those at the base of the pinnoe both in size & form; all strongly marked by the midrib, on which are placed almost perpendicularly a number of close fine veins, usually simple, but sometimes forked.

-When the primules are decurrent, it is the A. lonchitidis- when rounded at the base the A. vulgatior.

Last edit about 2 years ago by EricRoscoe
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Carboniferous

Pottsville Pa,

Picton &, South Joggins, Nova Scotia Tallmage, Summit Co. & Zanesville Ohio, Salvies (Keuhawa river) Va.

(Also in Europe)

Last edit almost 2 years ago by EricRoscoe
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