- A plant of a group that comprises those that have seeds unprotected by an ovary or fruit, including the conifers, cycads, and ginkgo. Compare with angiosperm.
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- Subdivision Gymnospermae, division Spermatophyta
- Taxonomists can now say that the ferns' closest cousins are the seed plants - angiosperms (flowering plants) and gymnosperms (such as conifers).
- The known flora consists of 41 ferns and fern allies, 3 gymnosperms, 291 monocots, and 516 dicots.
- Moreover, since the expression pattern is similar in a gymnosperm and in an angiosperm this function appears to be evolutionarily conserved.
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- In contrast, the interval between c.916m and 885.9Om is totally dominated by gymnospermous saccate pollen, with very few fern spores.
- So this is a time period where gymnospermous plants predominated, including cycadioids which look like modern cycads, and various groups of extinct conifers and seed ferns.
- The late Triassic showed major radiation of plants, gymnospermous groups in particular, in both the Northern and Southern Hemispheres.
Más definiciones de gymnospermDefinición de gymnosperm en:
- el diccionario Inglés de EE.UU.