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Lycopodium obscurum

Lycopodium obscurum ground pine/ tree clubmoss Lycopodiaceae LYOB; Q; R, bd, gb, h, ro, t;

Evergreen perennial herb, colonial from deep underground stems (rhizomes), leafy stems erect, to 20 cm tall, tree-like, dark green, branches with a slender, bottle-brush appearance. Leaves tiny, scale-like, overlapping, in 6-8 ranks, about 0.5 cm long, 0.1 cm wide, numerous, sharp-pointed. Spore cones yellow, 2-7 cm long, about 0.6 cm wide, in a candelabra-like arrangement above foliage; spores produced July-Sept. (Radford et al. 1968). Wetland status: FACU. Frequency in NYC: Infrequent. Origin: Native. Habitat: Undisturbed, moist woods, swamp forest edges. Appears more shade tolerant and requiring more moisture than L. digitatum. Notes: see L. digitatum. Lycopodiums cannot be successfully transplanted or propagated for restoration to natural areas (Montgomery and Fairbrothers 1992). Habitat protection is the only means of conserving these plants.

Photo: MBGargiullo

 

Lycopodium digitatum ground cedar

Lycopodium digitatum (L. complanatum var. flabelliforme) ground cedar/ fan clubmoss Lycopodiaceae LYDI; R, gb, sv;

Perennial evergreen herb to 30 cm tall, colonial from stems running along the ground or just below the, soil surface, rooting at nodes, leafy stems erect, rather yellow-green, branches flattened, 0.2-0.3 cm wide, fan-shaped. Leaves tiny, scale-like, flat, in 4-ranks, tips sharply pointed, bases broad and fused to branch surface. Spore cones yellow, 2-4 (or more) cm long, 0.5 cm wide, 1-4 or more in a candelabra arrangement above green branches. Wetland status: FACU. Frequency in NYC: very infrequent. Origin: Native. Habitat: Dry, sterile soil in undisturbed open woods or burned or cut-over areas. Notes: Lycopodiums cannot be successfully transplanted or propagated for restoration to natural areas. Habitat protection is the only means of conserving these plants. They have a two stage life cycle and are usually dependent upon specialized symbiotic, mycorrhizal fungi during the […]