Seed from the Upper Devonian

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Science  30 Jun 1967:
Vol. 156, Issue 3783, pp. 1727-1729
DOI: 10.1126/science.156.3783.1727


We present evidence proving the existence of seeds in the Upper Devonian and extending the known age of seed plants from the Lower Carboniferous (Mississippian) into the Upper Devonian.