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Progymnospermopsida

Progymnospermopsida (progymnosperms) The ancestors of the gymnosperms, which arose in the Devonian and dwindled to extinction in the latter part of the Carboniferous. They had trunks with wood resembling that of gymnosperms, but their fertile branches or leaves bore sporangia (see SPORE), and their foliage was often fern like. Probably seeds evolved in various different progymnosperms. See ARCHAEOPTERIS.

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"Progymnospermopsida." A Dictionary of Earth Sciences. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"Progymnospermopsida." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/progymnospermopsida

"Progymnospermopsida." A Dictionary of Earth Sciences. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/progymnospermopsida

Progymnospermopsida

Progymnospermopsida The ancestors of the gymnosperms, which arose in the Devonian and dwindled to extinction in the latter part of the Carboniferous. Probably seeds evolved in various different progymnosperms.

Cite this article
Pick a style below, and copy the text for your bibliography.

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"Progymnospermopsida." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"Progymnospermopsida." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/progymnospermopsida-0

"Progymnospermopsida." A Dictionary of Plant Sciences. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/progymnospermopsida-0