Lycopodium spp.
Family: Lycopodiaceae
Lycopodium image
Plants mainly trailing on ground. Roots emerging from point of origin on underside of main stems. Horizontal stems on substrate surface or subterranean, long-creeping. Upright shoots scattered along horizontal stem, 5--16 mm diam., round or flat in cross section, unbranched or with 1--4 lateral branchlets. Leaves not imbricate, linear to linear-lanceolate; leaves on horizontal stems scattered, appressed, membranous; leaves on lateral branchlets mostly 6-ranked or more, monomorphic with few exceptions, appressed, ascending to spreading, margins entire to dentate. Gemmiferous branchlets and gemmae absent. Strobili single and sessile or multiple and pedunculate, apex blunt to acute; peduncle, when present, conspicuously leafy; sporophylls extremely reduced, much shorter than peduncle or stem leaves. Sporangia reniform. Spores reticulate, sides at equator convex, angles acute. Gametophytes nonphotosynthetic, mycorrhizal, subterranean, flat and irregularly button-shaped, with ring meristem around circumference. x = 34. In striking contrast to Diphasiastrum , Huperzia , and Lycopodiella , interspecific hybridization is practically unknown in Lycopodium . Many of the species now recognized in Lycopodium have been segregated from Lycopodium clavatum , L . annotinum , and L . jussiaei Desvaux ex Poiret. The three groups given in the key below should probably be treated as subgenera.

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Image of Lycopodium chapmanii
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Image of Lycopodium dichotomum
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Lycopodium
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Image of Lycopodium japonicum
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Image of Lycopodium laterale
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Image of Lycopodium nutans
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Image of Lycopodium phlegmaria
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Image of Lycopodium phyllanthum
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Image of Lycopodium porophilum
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Image of Lycopodium prostratum
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Image of Lycopodium pungens
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Image of Lycopodium sabinaefolium
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Image of Lycopodium serratum
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Image of Lycopodium venustulum
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Image of Lycopodium volubile
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Image of Lycopodium x bartleyi
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Image of Lycopodium x habereri
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Image of Lycopodium x zeilleri
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