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

Pinus rigios (Unger) Ettinsghausen	Kvaček, Teodoridis, Zajícová (2015) Pl. 1, fig. 5	EK238
Pinus silvestris		p6133
Pinus		EK239
Pinus	Bůžek (1971), Pl. 7, fig. 8	ČB47
Pinus		RS32
Pinus		RS33
Pinus		RS30
Pinus		RS29
Pinus		RS31
Pinus		RS28
Pityophyllum	Knobloch (1964), text. fig 2	p3310
Poacordaites		ZŠ331
Poacordaites		ZŠ337
Poacordaites		ZŠ522
Pseudomariopteris busquetii		ZŠ174
Pseudomariopteris ribeyronii		ZŠ318
Pteridospermopsida Oliver a Scott, 1904	AD, Šimůnek et al. (2004)	ZŠ352
Pteridospermopsida Oliver a Scott, 1904	AD, Šimůnek et al. (2004)	ZŠ354
Pteridospermopsida Oliver a Scott, 1904	AD, ?imůnek et al. (2004)	ZŠ355
Pteridospermopsida Oliver a Scott, 1904	AD, Šimůnek et al. (2004)	ZŠ353

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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]