OregonFlora: Lycopodium annotinum

	Lycopodium annotinum
	bristly clubmoss, stiff clubmoss
Habit	Herbs perennial, often forming loose mats; roots produced infrequently along trailing stems.
Stems	densely leafy; main stem longcreeping, ascending stems produced dichotomously from main stem at regular intervals, branching to form clumps of erect, densely leafy stems; to approximately 10 cm tall, with prominent annual bud constrictions.
Leaves	of trailing stems 5–6 × 0.9 mm, falcate, not obscuring the sulcate stem, leaves of ascending stems dense, arranged in 6–8 ranks, sometimes appearing whorled, pale yellow-green when dry; darker when fresh, 5–7 mm long, lanceolate and broadest just above the base; margin with small teeth; apex acute, lacking a tip hair.
Peduncles	not differentiated.
Cones	15–25 × approximately 4 mm.
Sporophylls	buff -colored when mature, approximately 3 × 2 mm; ovate or triangular and long-acuminate.

	Lycopodium annotinum
Distribution
Discussion	Moist coniferous forests, stream banks, and seepage, occasionally in open boggy meadows. 0–1900 m. BW, Casc. ID, WA; western and northeastern US, Canada, Greenland; circumboreal. Native.
Source	Flora of Oregon, volume 1, page 84 Duncan Thomas
Sibling taxa	L. clavatum
Synonyms	Spinulum annotinum
Web links	Local floras: BC, OR Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Lycopodium annotinum

bristly clubmoss, stiff clubmoss

Habit

Herbs perennial, often forming loose mats; roots produced infrequently along trailing stems.

Stems

densely leafy; main stem longcreeping, ascending stems produced dichotomously from main stem at regular intervals, branching to form clumps of erect, densely leafy stems; to approximately 10 cm tall, with prominent annual bud constrictions.

Leaves

of trailing stems 5–6 × 0.9 mm, falcate, not obscuring the sulcate stem, leaves of ascending stems dense, arranged in 6–8 ranks, sometimes appearing whorled, pale yellow-green when dry; darker when fresh, 5–7 mm long, lanceolate and broadest just above the base;

margin with small teeth;

apex acute, lacking a tip hair.

Peduncles

not differentiated.

Cones

15–25 × approximately 4 mm.

Sporophylls

buff -colored when mature, approximately 3 × 2 mm; ovate or triangular and long-acuminate.

Lycopodium annotinum

Distribution

Discussion

Moist coniferous forests, stream banks, and seepage, occasionally in open boggy meadows. 0–1900 m. BW, Casc. ID, WA; western and northeastern US, Canada, Greenland; circumboreal. Native.

Source

Flora of Oregon, volume 1, page 84
Duncan Thomas

Sibling taxa

L. clavatum

Synonyms

Spinulum annotinum

Web links