The Hybrid between<i>Equisetum scirpoides</i>and<i>E. variegatum</i>in Northern Europe

Lubienski, Marcus; Dörken, Veit Martin

doi:10.1640/0002-8444-106.2.116.1

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2018

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“…bogotense is the most phylogenetically isolated living species of the genus, having a distinct evolutionary history, as compared to the rest of extant Equisetum species, since the Mesozoic (Des Marais et al., ; Guillon, , ). Additionally, these placements may help to explain why E. bogotense is the only species that does not appear to hybridize with other species of the genus (Hauke, ; Lubienski and Dörken, ) and why it has several features that set it apart from the other living species in the genus (e.g., gametophyte morphology; Hauke, , ).…”

Section: Discussionmentioning

confidence: 99%

Origin of Equisetum: Evolution of horsetails (Equisetales) within the major euphyllophyte clade Sphenopsida

Elgorriaga

Escapa

Rothwell

et al. 2018

American J of Botany

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Modern horsetails are not nested within calamitaceans; instead, both groups have explored independent evolutionary trajectories since the Carboniferous. Diverse fossil taxon sampling helps to shed light on the position and relationships of equisetalean lineages, of which only a tiny remnant is present within the extant flora. Understanding these relationships and early character configurations of ancient plant clades as Equisetales provide useful tests of hypotheses about overall phylogenetic relationships of euphyllophytes and foundations for future tests of molecular dates with paleontological data.

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