Botany: General

A Dictionary of Earth Sciences A Dictionary of Plant Sciences Further reading

seed plants

A Dictionary of Earth Sciences | 1999 | | Copyright

seed plants The group that comprises the gymnosperms and angiosperms, plants distinguished by their production of seeds rather than spores. They arose in the Devonian from pteridophyte forebears, probably of a heterosporous character (i.e. bearing microspores and megaspores (see SPORE) on the same plant). These early seed plants were gymnosperms. Angiosperms are not certainly represented in the fossil record until the early Cretaceous.

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AILSA ALLABY and MICHAEL ALLABY. "seed plants." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "seed plants." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-seedplants.html

AILSA ALLABY and MICHAEL ALLABY. "seed plants." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-seedplants.html

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seed plants

A Dictionary of Plant Sciences | 1998 | | Copyright

seed plants The group that comprises the gymnosperms and angiosperms, plants distinguished by their production of seeds rather than spores. They arose in the Devonian from pteridophyte forebears, probably of a heterosporous character. These early seed plants were gymnosperms. Angiosperms are not certainly represented in the fossil record until the early Cretaceous.

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

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MICHAEL ALLABY. "seed plants." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "seed plants." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O7-seedplants.html

MICHAEL ALLABY. "seed plants." A Dictionary of Plant Sciences. 1998. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-seedplants.html

Learn more about citation styles

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