Horneophytopsida

Taxobox
name = Horneophytopsida
fossil_range = Late Silurian to Early Devonian


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regnum = Plantae
divisio = unassigned
classis = Horneophytopsida †
subdivision_ranks =
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Horneophytopsida is a class of early vascular plants including the genera "Caia", "Tortilicaulis", and "Horneophyton". Although formerly classified among the Rhyniophyta, the group is distinctive for having branched sporangia, and lacking true xylem.cite book | last = Kenrick | first = Paul | coauthors = Peter R. Crane | year = 1997 | title = The Origin and Early Diversification of Land Plants : A Cladistic Study | location = Washington, D.C. | publisher = Smithsonian Institution Press | pages=pp. 139-140, 249 | isbn = 1-56098-730-8 ]

left|thumb|240px|Cladogram_of_the_land plants showing the position of the "rhyniophytes" (in blue). Diagram based on Kenrick & Crane 1997. More recent molecular research reverses the position of the hornworts and mosses. [Qiu "et al." 2006]

References

ee also

Polysporangiophytes

External links

* [http://www.abdn.ac.uk/rhynie/horneo.htm "Horneophyton" at the University of Aberdeen]