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enation theory

A Dictionary of Earth Sciences | 1999 | | Copyright

enation theory The theory that accounts for the origin of the fern leaf by suggesting that it arose from the development of simple outgrowths (enations). Any such theory has to account for the large, branching fronds of a fern with branching veins (a ‘megaphyll’) and also for the small leaves (‘microphylls’) with a single median vein.

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AILSA ALLABY and MICHAEL ALLABY. "enation theory." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "enation theory." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-enationtheory.html

AILSA ALLABY and MICHAEL ALLABY. "enation theory." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-enationtheory.html

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enation theory

A Dictionary of Ecology | 2004 | | Copyright

enation theory The theory that accounts for the origin of the fern leaf by suggesting that it arose from the development of simple outgrowths (enations). Any such theory has to account for the large, branching fronds of a fern with branching veins (a ‘megaphyll’) and also for small leaves (‘microphylls’) with a single median vein.

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

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MICHAEL ALLABY. "enation theory." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "enation theory." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-enationtheory.html

MICHAEL ALLABY. "enation theory." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-enationtheory.html

Learn more about citation styles