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

Eusphenopteris		ZŠ816
Eusphenopteris		ZŠ834
Eusphenopteris		ZŠ844
Eusphenopteris		ZŠ835
Frenelopsis alata	Knobloch (1967), Pl. XIII, fig. 3	p4905
Geinitzia cretacea	AD, Knobloch (1964)	p2962
Geinitzia cretacea	AD, Knobloch (1964)	p2949
Givesia media		ZŠ499
Givesia media		ZŠ500
Glyptostrobus europaeus		p2670
Glyptostrobus europaeus	Bůžek (1971), Pl. 7, fig. 5, 6	ČB4
Glyptostrobus europaeus	Bůžek (1971), Pl. 7, fig. 3, 4	ČB3
Glyptostrobus europaeus	AD, Bůžek (1971)	ČB31
Glyptostrobus europaeus	AD Bůžek (1971)	ČB348
Glyptostrobus europaeus		p2661
Glyptostrobus europaeus		p2672
Glyptostrobus europaeus	Bůžek (1971), Pl. 7, fig. 7	ČB10
Glyptostrobus europaeus	AD, Bůžek (1971)	ČB32
Glyptostrobus europaeus	Bů?ek, Holý, Kvaček (1976)Pl. II, fig. 4	ČB678
Gomphostrobus bifidus	Šimůnek (2017), Pl. 5, fig. 5	ZŠ660

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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]