title: Seed from the upper devonian.
abstract: 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.
authors.forename: J M
authors.initials: JM
authors.lastname: Pettitt
authors.forename: C B
authors.initials: CB
authors.lastname: Beck