Lycopodium annotinum
bristly club-moss, lycopode interrompu, stiff club-moss
on substrate surface.
clustered, mainly unbranched or sparsely branching mainly at base, 1.2–1.6 cm diam.;
annual bud constrictions abrupt and conspicuous.
few and like upright shoots but annual bud constrictions absent.
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.
solitary, sessile on shoots, 15–30 × 3.5–4.5 mm.
(1.5–)3.5 × 0.7(–2) mm, abruptly narrowed to pointed tip.
= 68.
Lycopodium annotinum
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.)
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