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Published In: Species Plantarum 2: 1100. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 8/5/2009)


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2. Lycopodium L. (clubmoss)

Stems branching, often differentiated into a horizontal rhizome and an erect, aerial branching system. Leaves usually dimorphic or trimorphic, the leaves of the horizontal axes different from those of the aerial stems, and these different from the sporophylls. Gemmae not produced. Sporangia in strobili at the tips of aerial branches. Gametophytes subterranean, mycorrhizal, lacking chlorophyll, obconic or irregularly disk-shaped. About 40 species, nearly worldwide, but mostly in temperate to Arctic regions, or at high elevations in the tropics.


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1 Ultimate branches round in cross-section, the leaves needlelike and radiating in several directions 1 Lycopodium dendroideum
+ Ultimate branches flattened in cross-section, the leaves scalelike and differentiated into 1 row along each edge of the flattened branches and 1 row appressed to each surface (2)
2 (1) Rhizomes on or at the surface of the soil; scalelike leaves on the lower surface of the ultimate branches minute, triangular, not overlapping, much smaller than those of the upper surface 2 Lycopodium digitatum
+ Rhizomes 5–15 cm below the surface of the soil; scalelike leaves on the lower surface of the ultimate branches lanceolate, overlapping, similar to those of the upper surface 3 Lycopodium tristachyum
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