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Science 30 June 1967:
Vol. 156. no. 3783, pp. 1727 - 1729
DOI: 10.1126/science.156.3783.1727
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Articles

Seed from the Upper Devonian

John M. Pettitt 1 and Charles B. Beck 1

1 Department of Botany, University of Michigan, Ann Arbor

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.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)