File:EB1911 Paleobotany - Calamites - young stem.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:12, 7 September 2017 | 1,051 × 776 (279 KB) | Bob Burkhardt | {{Information |Description ={{en|1=Photograph of ''Calamites'': part of transverse section of a young stem, showing pith, vascular bundles with secondary wood, and cortex.}} |Source =“Palaeobotany,” Encyclopædia Britannica (11th ed.), v... |
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