Pennsylvanian Fern ID

[historianmichael]

Several years ago I collected these ferns in central PA. I am currently working back through my collection making sure that everything has an identification. I have most of the identifications down, but could use some help pinpointing or confirming these identifications. Any help is greatly appreciated. Thanks!

 

#1- ???? - I tried to tip it in the light so that it is more visible. It measures about 53mm

 

 

#2- Neuropteris ovata?

 

#3- Macroneuropteris scheuchzeri? It measures 40mm

 

#4- Neuropteris?

 

#5- Neuropteris on the left? I know that it is Macroneuropteris scheuchzeri on the right

 

#6- Macroneuropteris scheuchzeri?

 

#7- ???? - It looks like a branch with thorns

[Fossildude19]

@fiddlehead   @paleoflor

[Strepsodus]

I’m not very familiar with American plants but I think the one on the left on #5 is Pecopteris sp.  I suspect #4 is also Pecopteris.  I think #1 is most likely a poorly preserved Macroneuropteris.

[historianmichael]

Any other thoughts?

[deutscheben]

Pennsylvanian plant taxonomy is hard to keep up with, and with incomplete examples and without seeing fine details like the veins it would be hard to get IDs to the species level. I would be happy to try and lend my experience (and guidebook library), though. 

 

1. Pretty confusing! It almost looks like two things overlaying each other, or like @Strepsodus said, something that has been partially degraded. 

2. Yes, looks like Neuropteris, although I don't feel confident on the species

3., 5., 6. This does look like a Neuropteris or Macroneuropteris, but I don't think it is M.scheuchzeri- I don't see the distinctive coarse hairs typical for the species on any of them

4. Agree with Neuropteris 

5. I agree with @Strepsodus again, the one on the left looks more like Pecopteris

7. Definitely a branch indeed, but I don't think those are thorns- they are the bases of smaller branches or fronds that have broken off. 

 

It's a very nice collection!

[historianmichael]

Thank you @Strepsodus and @deutscheben for your thoughts. Perhaps it is Macroneuropteris macrophylla then. I also found this much larger isolated Macroneuropteris sp. leaf at the same locale. It measures about 10 cm. I will have to look closely at the leaves under a magnification to see if they have a coarse hairs like appearance.