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Gymnosperms

      The gymnosperms are a group of seed-bearing plants that includes conifers, cycads, Ginkgo, and Gnetales. The term "gymnosperm" comes from the Greek word gymnospermos (γυμνόσπερμος), meaning "naked seeds", after the unenclosed condition of their seeds (called ovules in their unfertilized state). Their naked condition stands in contrast to the seeds or ovules of flowering plants (angiosperms), which are enclosed during pollination. Gymnosperm seeds develop either on the surface of scale- or leaf-like appendages of cones, or at the end of short stalks (Ginkgo). The gymnosperms and angiosperms together comprise the spermatophytes or seed plants. By far the largest group of living gymnosperms are the conifers (pines, cypresses, and relatives), followed by cycads, Gnetales (Gnetophyta, Ephedra and Welwitschia), and Ginkgo (a single living species).

Source: http://en.wikipedia.org/wiki/Gymnosperms
Gomphostrobus bifidusŠimůnek (2017), Pl. 5, fig. 5 ZŠ660
Gomphostrobus bifidus ZŠ729
Gomphostrobus bifidus ZŠ742
Gomphostrobus bifidusŠimůnek et al. (2017?), Pl. 5, fig. 4 ZŠ669
Gomphostrobus bifidus ZŠ659
Gomphostrobus bifidus ZŠ670
Gracillopteris bergeroniiŠimůnek et al. (2017), Pl. 3, fig. 3 ZŠ637
Gymnospermophyta Lindley, 1830 AN770
Gymnospermophyta Lindley, 1830 AN773
Haliserites comosus XA261
Haliserites zonaroides XA255
Hermitia germanica ZŠ662
Hermitia germanicaŠimůnek et al. (2017), Pl. 4, fig. 4 ZŠ661
Hermitia germanica ZŠ202
Istisporites inornatusKnobloch (1984), Pl. III, fig. 7 EK141
Istisporites inornatusKnobloch (1984), Pl. III, fig. 8 EK147
Istisporites inornatusKnobloch (1984), Pl. III, fig. 10 EK143
Istisporites inornatusAD, Knobloch (1979), Pl. IV, fig. 9 EK185
Istisporites inornatusKnobloch (1984), Pl. III, fig. 12 EK145
Istisporites inornatusKnobloch (1984), Pl. III, fig. 9 EK181
Virtual museum of the Czech Geological Survey, cgs.gov.cz, (C) Czech Geological Survey, 2011, v.1.01 [29.09.2025]