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Sigillaria(sĭjĭlâr`ēə), genus of fossil club moss allied to LepidodendronLepidodendron and Sigillaria
, two principal genera of an extinct group of primitive vascular trees. They dominated the forests of the early Carboniferous period until the ferns gained ascendancy.
..... Click the link for more information. , abundant in the Carboniferous period. The thick trunk was rarely branched and was covered for several feet from the top with erect leaves that were larger than those of Lepidodendron; the leaf scars were in vertical rows. The fossilized root stocks of Sigillaria, as of Lepidodendron, are known as stigmaria. Club mosses are classified in the division LycopodiophytaLycopodiophyta
, division of the plant kingdom consisting of the organisms commonly called club mosses and quillworts. As in other vascular plants, the sporophyte, or spore-producing phase, is the conspicuous generation, and the gametophyte, or gamete-producing phase, is minute.
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