Herrin Fossil Flora
Sphenopsids - Relatives of the Horsetails
Leaf Whorls
Annularia inflata
Annularia inflata, (Page 3, Fig. 3. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - G.Monreal
K.Mitsui
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C.Puritz
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A.Young
D.Carlson
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G.Monreal
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A.Young
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A.Young
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A.Young
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A.Young
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S.Dibblee
D.Carlson
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D.Bedrosian
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D.Quasney
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Annularia annulariaefolius
Annularia annulariaefolius, (Page 3, Fig. 2. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - A.Young
Annularia annulariaefolius, details above and below. - A.Young
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A.Young
Annularia sphenophylloides
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Annularia sphenophylloides, (Page 3, Fig. 4. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - C.Puritz
Annularia sphenophylloides with Macroneuropteris scheuchzerii, Asolanus camptotaenia, and Synchysidendron andrewsii. - B. Riegler.
Asterophyllites equisetiformis
Asterophyllites equisetiformis, (Page 3, Fig. 5. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - A.Jansen
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B.Riegler
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A.Young
P.Anderson
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B.Riegler
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Sphenophyllum emarginatum
A.Young
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B.Riegler
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Sphenophyllum emarginatum, (Page 3, Fig. 1. Herrin Roof Shale Flora field guides, ESCONI/Wittry). - B.Riegler
R.Szalkowski
A.Young
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A.Young
A.Young
A.Young
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T.Rainge
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Sphenophyllum with Alethopteris lesquereuxii. - D.Carlson
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D.Bedrosian
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