Lycopodium annotinum
Lycopodium lagopus
bristly club-moss, lycopode interrompu, stiff club-moss
lycopode patte-de-lapin, one-cone club-moss, ptarmigan club-moss
on substrate surface.
on substrate surface.
clustered, mainly unbranched or sparsely branching mainly at base, 1.2–1.6 cm diam.;
annual bud constrictions abrupt and conspicuous.
clustered, shoots 0.5–0.8 cm diam., dominant main shoot branches 2–3(–4), mostly in lower 1/2.
few and like upright shoots but annual bud constrictions absent.
few and like upright shoots;
annual bud constrictions abrupt and conspicuous, shoots 0.5–0.8 cm wide, branches mostly erect.
spreading to reflexed, dark green, linear-lanceolate, (2.5–)5–8 × 0.6–1.2 mm;
margins closely and shallowly dentate mainly in distal 1/2;
apex sharply pointed, lacking hair tip.
ascending to appressed, medium green, 3–5 × 0.4–0.7 mm;
margins entire;
apex with narrow hair tip 1–3 mm.
3.5–12.5 cm, with remote pseudowhorls of appressed leaves, unbranched.
solitary, sessile on shoots, 15–30 × 3.5–4.5 mm.
solitary (if double, usually nearly sessile), 20–55 × 3–5 mm.
(1.5–)3.5 × 0.7(–2) mm, abruptly narrowed to pointed tip.
1.5–2.5 mm, apex rather gradually reduced to hair tip.
= 68.
= 68.
Lycopodium annotinum
Lycopodium lagopus
This widespread and common club-moss has been divided into various forms or varieties, some of which have been treated as species. Present evidence supports the hypothesis that these are environmentally induced forms, the most distinctive of which has been called Lycopodium annotinum var. alpestre C. Hartman, with leaves only 2.5–6 mm, very leathery, entire-margined, and appressed. Plants intermediate between this and L. annotinum var. annotinum are a form that has been called var. pungens (Bachelot de la Pylaie) Desvaux, an invalid name. Both are found in cold, bleak, northern or high elevation habitats. The species should be studied in detail to determine whether it contains any groups that should be recognized taxonomically.
Lycopodium clavatum group
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Lycopodium lagopus is generally more northern than its sister species, L. clavatum (W. J. Cody and D. M. Britton 1989). Where they come together, however, they can grow side by side (even in southern Michigan) and maintain their distinctions.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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