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![]() Date: 2012-12-15 15:31:57Plant morphology Living fossils Trees Plant reproduction Sporangium Carboniferous Sigillaria Paleobotany Cordaites Biology Botany Lycopodiophyta | Add to Reading List |
![]() | GEOLOGICAL SURVEY OF OHIO. VOL. 1. PART II. PALÆONTOLOGY. SECTION III.DocID: v5Ij - View Document |