Lycopodium

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Related to Lycopods: Cordaites, Lycopodiophyta

lycopodium

[‚lī·kə′pōd·ē·əm]
(materials)
A yellow powder prepared from the spores of Lycopodium clavatum ; used as a desiccant and absorbent.

Lycopodium

 

a genus of evergreen herbaceous plants of the family Lycopodiaceae. The numerous spikelets are apical and dense. They consist of an axis with spirally arranged sporophylls, on the upper side of which are the sporangia. The subulate leaves are on unflattened branches. There are approximately ten species, distributed primarily in the forest zone of the northern hemisphere. The spores are used by the pharmaceutical industry and in foundry work.

References in periodicals archive ?
In this article, Nevins does acknowledge that certain lycopods and ferns are commonly found in Carboniferous age coal beds but neither Nevins nor other creationist authors tell their audience that these coal beds have no flowering plant component.
Several years ago, when I took my college class on a field trip to the area, I regaled them with the ancient lineage of the lycopods and explained that their spores are exceedingly small but of a uniform diameter.
The lycopods, horsetails, and ferns (spore-producing plants) are some of the best studied groups of plants in Mississippi.
And unlike modern trees, which rely on their wood for structural support, the lycopods were more bark than anything else.
The free-living sporophytes of ferns and lycopods were derived from the dependent sporophytes of a bryophyte-like plant by further proliferation and sterilization, and the acquisition of physiological independence from the gametophyte.
There were also giant lycopods (Lepidoden-dron, Sigillaria, etc.
From this Psilophyton-like type were derived two lines of evolution--the lycopods, on the one hand, which retained their phylloids and dichotomous cauloids, and, on the other, all other vascular cryptogams, the pteridosperms, all gymnosperms and angiosperms.
In vascular cryptogams (psilophytes, lycopods, sphenophytes, ferns), the sporophyte, though usually becoming independent, nonetheless has early stages that are heavily dependent on the gametophyte.
Older ideas had conifers linked to groups as different as the lycopods and the cordaites.