Help with ID (2)

[HeavyFletch]

Found on the surface...farm field...southern Illinois Thanks in advance

 

[Ninjafossils]

Not entirely sure if it is organic in nature. If it is, I'd say the internal cast to a Carboniferous tree.

 

[GatorBoy]

Can you show a photo of 1 of the ends

 

[HeavyFletch]

Gator......... Both ends cleaned as best I could. Look like just rock to me.........

 

[Harry Pristis]

It's a cast of a sphenopsid, Calamites sp.