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Lycopodium

Lycopodium
Family: Lycopodiaceae
Lycopodium image
  • FNA
  • Gleason & Cronquist
  • Resources
Warren H. Wagner Jr. & Joseph M. Beitel in Flora of North America (vol. 2)
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.

Vascular plants of NE US and adjacent Canada
Leafy-stemmed perennial herbs, often evergreen. 400, cosmop. (Diphasiastrum, Diphasium, Huperzia, Lepidotis, Lycopodiella, Pseudolycopodiella) species in a given section or subgenus are cytologically similar and commonly form ±sterile but vegetatively vigorous hybrids that often reproduce effectively by rhizomes or gemmae, sometimes forming considerable populations. Some of these hybrids are: L. xbrucei (Cranfill) Lellinger = L. appressum x prostratum; L. xbuttersii Abbe = L. lucidulum x selago; L. xcopelandii Eiger = L. alopecuroides x appressum; L. x habereri House = L. digitatum x tristachyum; L. xissleri (Rouy) Lawalree = L. alpinum x complanatum; L. xzeilleri (Rouy) Beitel = L. complanatum x tristachyum.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within checklist: Maine Plants
Lycopodium adpressum
Media resource of Lycopodium adpressum
Map not
Available
Lycopodium alopecuroides
Media resource of Lycopodium alopecuroides
Map not
Available
Lycopodium alpinum
Media resource of Lycopodium alpinum
Map not
Available
Lycopodium annotinum
Media resource of Lycopodium annotinum
Map not
Available
Lycopodium appressum
Media resource of Lycopodium appressum
Map not
Available
Lycopodium armatum
Media
not available
Map not
Available
Lycopodium chamicyparissus
Media resource of Lycopodium chamicyparissus
Map not
Available
Lycopodium clavatum
Media resource of Lycopodium clavatum
Map not
Available
Lycopodium complanatum
Media resource of Lycopodium complanatum
Map not
Available
Lycopodium dendroideum
Media resource of Lycopodium dendroideum
Map not
Available
Lycopodium digitatum
Media resource of Lycopodium digitatum
Map not
Available
Lycopodium flabelliforme
Media resource of Lycopodium flabelliforme
Map not
Available
Lycopodium hickeyi
Media resource of Lycopodium hickeyi
Map not
Available
Lycopodium inundatum
Media resource of Lycopodium inundatum
Map not
Available
Lycopodium lagopus
Media resource of Lycopodium lagopus
Map not
Available
Lycopodium obscurum
Media resource of Lycopodium obscurum
Map not
Available
Lycopodium prostratum
Media resource of Lycopodium prostratum
Map not
Available
Lycopodium rupestre
Media resource of Lycopodium rupestre
Map not
Available
Lycopodium sabinaefolium
Media resource of Lycopodium sabinaefolium
Map not
Available
Lycopodium sabinifolium
Media resource of Lycopodium sabinifolium
Map not
Available
Lycopodium selago
Media resource of Lycopodium selago
Map not
Available
Lycopodium sitchense
Media resource of Lycopodium sitchense
Map not
Available
Lycopodium tristachyum
Media resource of Lycopodium tristachyum
Map not
Available
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