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Norstog KJ (1986). "The
blepharoplast of
Zamia pumila L.".
Botanical Gazette. 147...
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David W.;
Norstog, Knut (1993). "Physical and
Ultrastructural Basis of Blue Leaf Iridescence...
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Stevenson DW,
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Fawcett PK (1998). "Pollination
Biology Of Cycads". In
Owens SJ, Rudall...
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November 2021. "Appendices | CITES". cites.org.
Retrieved 2024-01-17.
Norstog, Knut J., and
Trevor J. Nicholls. The
Biology of the Cycads. New York :...
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genus of the family. The
genus is
commonly divided into two
groups by
Norstog &
Nichols of
distinct morphology. The
first includes D. mejiae, D. rzedowskii...
- 31 (5): 367–373. doi:10.2307/1308401. ISSN 0006-3568. JSTOR 1308401.
Norstog, Knut J.; Gifford,
Ernest M.; Stevenson,
Dennis Wm (2004). "Comparative...
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Norstog, Knut; Nicholls,
Trevor J. (15 May 2019). The
Biology of the Cycads. Cornell...
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importance of this
distinction has been
quoted by
famous cycadologist Knut
Norstog, in
comparing the
analysis of
cycad history to the
interpretation of the...
