Possible Refs

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Unsorted. Delete ad lib. hth rosetta

  • Fins, L. Genetic architecture of giant sequoia. Berkeley: Univ. of California; 1981. Dissertation.
  • S.E.Schlarbaum and T.Tsuchiy (1984): Cytotaxonomy and phylogeny in certain species of Taxodiaceae. Plant Systematics and Evolution, Volume 147, Numbers 1-2 / March, 1984. p29-54. ISSN 0378-2697 (Print) 1615-6110 (Online). DOI 10.1007/BF00984578.
  • M. Raj Ahuja (2008): Genetic constitution and diversity in four narrow endemic redwoods from the family Cupressaceae. Euphytica Volume 165, Number 1 / January, 2009. p5-19. ISSN 0014-2336 (Print) 1573-5060 (Online). DOI 10.1007/s10681-008-9813-3.
  • Chaney, R.W. (1951). A Revision of Fossil Sequoia and Taxodium in Western North America based on the Recent Discovery of Metasequoia. Transcriptions of The American Philosophical Society, New Series 40(3): 171-263.
  • Wilson Nichols Stewart, Gar W. Rothwell (1993): Paleobotany and the evolution of plants. Cambridge University Press, 1993. ISBN 0521382947, 9780521382946. 521 pages. http://books.google.com/books?id=Fhm-oed74JgC&printsec=frontcover
  • Sergio Archangelsky. 1994. Aspects of Gondwana paleobotany: gymnosperms of the Paleozoic—Mesozoic transition. División Paleobotánica, Museo Argentino de Ciencias Naturales “B. Rivadavia”, Av. A. Gallardo, Buenos Aires.
  • M. Harland, J.E. Francis, S.J. Brentnall and D.J. Beerling (2006): Cretaceous (Albian–Aptian) conifer wood from Northern Hemisphere high latitudes: Forest composition and palaeoclimate.
  • R. Serbet and R. A. Stockey. 1991. Taxodiaceous pollen cones from the Upper Cretaceous (Horshoe Canyon Formation) of Drumheller, Alberta, Canada. Review of Palaeobotany and Palynology 70:67-76 [B. Tiffney/J. Fosdick/J. Fosdick].
  • Moiseeva, Maria et al.: Floras of Far East, North-Eastern Russia and Northern Alaska at the K/T boundary interval. IOP2008.
  • Sun, Ge et al.: Late Cretaceous plants from Jiayin along Heilongjiang River, Northeast China. IOP2008.
  • Millar, Constance (1996): Tertiary Vegetation History. Institute of Forest Genetics U.S. Forest Service Pacific Southwest Research Station Albany, California. In: Sierra Nevada Ecosystem Project: Final report to Congress, vol. II, Assessments and scientific basis for management options. Davis: University of California, Centers for Water and Wildland Resources, 1996.

--— Preceding unsigned comment added by 77.181.80.252 (talkcontribs) February 20, 2016 (UTC)

Hybridization

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First and foremost, such a hypothesis discussion would not belong into the Sequoioideae but rather in the Genus:Sequoia article. Second, theres contradicting findings too and this kind of discussion can't be biased. And third, there's no Sequoiadendron fossil older than about 60ma; while the fossil record of genus Sequoia is much older. It's highly unlikely they needed Sequoiadendron to come up with modern Sequoia sempervirens. Their respecitvie ecological spectrum was different so they rarely occurred together; and if any such hybridization happened, then most probably way before Sequoiadendron even existed. So please consider removing it, at least here. --Rosetta — Preceding unsigned comment added by 77.181.80.252 (talk) 20:12, 2016 February 20 (UTC)