Lycopodium clavatum |
Lycopodium obscurum |
|
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common club-moss, elk-moss, lycopode à massue, running club-moss, running-pine, stag's horn clubmoss |
flat-branch tree club-moss, lycopode obscur, rare clubmoss |
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Horizontal stems | on substrate surface. |
subterranean. |
Upright shoots | clustered, 0.6–1.2 cm diam., dominant main shoot with 3–6 branches mostly in lower 1/2. |
treelike, many branched, branchlets numerous and strongly differentiated; annual bud constrictions absent; leaves on main stem below lateral branchlets tightly appressed, needlelike, 3.5–4.5 × 0.6–0.7 mm, soft. |
Lateral branchlets | few and like upright shoots; annual bud constrictions abrupt, branchlets mostly spreading. |
flat in cross section, 6–9 mm diam.; annual bud constrictions inconspicuous. |
Leaves | spreading, often somewhat ascending in distal 1/3 of branches, medium green, linear, 4–6 × 0.4–0.8 mm; margins entire; apex with narrow hair tip 2.5–4 mm. |
in 6 ranks, 1 on upperside, 4 lateral, ascending-spreading, 2.5–5.5 × 0.5–1.2 mm, and 1 on underside, much smaller than others, ascending; margins entire; apex lacking hair tip. |
Peduncles | 3.5–12.5 cm, with remote pseudowhorls of appressed leaves, loosely branched into 2–5 alternate stalks, 0.5–0.8 cm. |
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Strobili | 2–5 on alternate stalks (if double, usually with stalks 5–8 mm), 15–25 × 3–6 mm. |
1–6 at tip of shoot, sessile, 12–60 mm. |
Sporophylls | 1.5–2.5 mm, apex abruptly reduced to hair tip. |
3 × 2 mm, apex long, gradually narrowing. |
2n | = 68. |
= 68. |
Lycopodium clavatum |
Lycopodium obscurum |
|
Habitat | Fields and woods | Rich hardwood forests and successional shrubby areas |
Elevation | 100–1800 m (300–5900 ft) | 0–1600 m (0–5200 ft) |
Distribution |
AK; CA; CT; GA; ID; IL; IN; KY; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OH; OR; PA; RI; TN; VA; VT; WA; WI; WV; BC; MB; NB; NF; NS; ON; PE; QC; SK; SPM; Mexico; Central America; South America; West Indies; Europe; Asia; Africa; Pacific Islands
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AL; CT; DE; GA; KY; MA; MD; ME; MI; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WI; WV; NB; NS; ON; QC
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Discussion | Plants found in eastern North America have been called Lycopodium clavatum var. clavatum; those in the western part of the range, which have been called L. clavatum var. integrifolium Goldie, are distinguished by early shedding of the characteristic hairs on the leaf tips. Lycopodium dendroideum group (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Lycopodiaceae > Lycopodium | Lycopodiaceae > Lycopodium |
Sibling taxa | ||
Synonyms | L. clavatum var. subremotum | |
Name authority | Linnaeus: Sp. Pl. 2: 1101. (1753) | Linnaeus: Sp. Pl. 2: 1102. (1753) |
Web links |
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