The Lycopodiophyta reference article from the English Wikipedia on 24-Apr-2004
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Lycopodiophyta

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Lycopodiophyta
Scientific classification
Lycopodiella cernuaEnlarge

Lycopodiella cernua

Domain:Eukaryotass
Kingdom:Plantae
Division:Lycopodiophyta
Classes

The Division Lycopodiophyta is a tracheophyte subdivision of the Kingdom Plantae that includes some of the most "primitive" of extant (living) vascular plants. These species reproduce by shedding spores and have macroscopic alternation of generations, although some are homosporous while others are heterosporous. All have simple leaves.

There are three main groups within the Lycopodiophyta, sometimes separated at the level of order and sometimes at the level of class. These are subdivided at the class level here: