>>6234218 PB
Redwood is the only known naturally occurring hexaploid conifer.
https://www.conifers.org/cu/Sequoia.php
Common names
Coast redwood, redwood, California redwood (Little 1980), coastal sequoia, palo colorado.
Taxonomic notes
Syn: Taxodium sempervirens D. Don in Lambert 1824 (Watson 1993); Sequoia sempervirens (Lambert) Endlicher (Peattie 1950). It is the sole species in Sequoia Endlicher 1847. Described varieties, all horticultural, include adpressa, glauca, nana pendula, pendula and prostrata (Silba 1986).
Redwood is the only known naturally occurring hexaploid conifer. See Ahuja (2009) for a review of its genetics. Hexaploidy likely arose in the Cretaceous through interspecific hybridization, though there are other possibilities (Ahuja and Neale 2002). The Save the Redwoods League (2017) has recently initiated an effort to fully sequence the Sequoia sempervirens genome.
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https://hexaploid.askdefine.com
There are few naturally occurring polyploid conifers. One example is the giant tree Sequoia sempervirens or Coast Redwood which is a hexaploid (6x) with 66 chromosomes (2n=6x=66), although the origin is unclear .