Horneophytopsida Information & Horneophytopsida Links at HealthHaven.com

Horneophytopsida; Fossil range: Late Silurian to Early Devonian
Scientific classification
Kingdom:	Plantae;
Division:	unassigned;
Class:	Horneophytopsida †;

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.^[1]

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.^[2]

[edit] References

^ ^a ^b Kenrick, Paul; Peter R. Crane (1997). The Origin and Early Diversification of Land Plants : A Cladistic Study. Washington, D.C.: Smithsonian Institution Press. pp. pp. 139-140, 249. ISBN 1-56098-730-8.
^ Qiu et al. 2006

[edit] See also

Polysporangiophytes

[edit] External links

Horneophyton at the University of Aberdeen

[Kenrick_1997-0] Kenrick, Paul; Peter R. Crane (1997). The Origin and Early Diversification of Land Plants : A Cladistic Study. Washington, D.C.: Smithsonian Institution Press. pp. pp. 139-140, 249. ISBN 1-56098-730-8.

[1] Qiu et al. 2006

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