ENSigillaria Alveolaria
Facsimile
Transcription
Status: Complete
Sigillaria alveolaria Brongt
Veg. Foss 1 p 443 t 162 fig 5
Lesq. Geol. Penn 2 p 872
Stem ribbed; ribs equal, narrow;
scars discoid, nearly contiguous, oval,
without angles; vascular scars three points
placed in the upper part of the disc
Coal Measures
Shamokin Penna.
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