Herrin Fossil Flora
Pteridosperms - Seed Ferns
Pinnae 1
Alethopteris lesquereuxii
Alethopteris lequereuxii, (Page 6, Fig. 4. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - A.Young
M.Angkuw
Alethopteris lesquereauxii. - A.Young
A.Young
A.Young
A.Jansen
S.Dibblee
Alethopteris lesquereuxii (right) with Callipteridium neuropteroides (left). - V.Anderson
A.Young
Alethopteris lesquereauxii. - G.Monreal (left photo taken by A.Young on site; right photo by G.Monreal)
Alethopteris lesquereauxii (right) with Alethopteris gibsonii (left) - Y.Rohowski
Alethopteris lesquereauxii in uncooked shale - C.Puritz
Alethopteris gibsonii
Alethopteris gibsonii with Oligocarpia gutbierii, (Page 6, Fig. 3. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - A.Young
M.Angkuw
Alethopteris gibsonii. - C.Davis
Alethopteris gibsonii - Y.Rohowski
Alethopteris zeilleri
Alethopteris zeilleri, (Page 6, Fig. 6. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - S.Dibblee
Carbon impressions in Herrin roof shale. - R.Szalkowski
Alethopteris sullivantii (?)
A.Young
S.Ness
A.Jansen
Callipteridium neuropteroides
Callipteridium neuropteroides, (Page 6, Fig. 7. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - M.Angkuw
Callipteridium neuropteroides (left) with Alethopteris lesquereuxii (right). - V. Anderson
Callipteridium neuropteroides. - L.Sunderlin
T.Brashers-Krug
Callipteridium neuropteroides in concretions. - R.Holm
Callipteridium neuropteroides frond in an enormous concretion. - S.Buss
Positive and negative halves - This large concretion was smashed open with a hammer.