Stiff Clubmoss - Lycopodium annotinum
MNPS Threat Rank
Stiff club-moss, a perennial, has elongated horizontal stems trailing on the ground, rooting at intervals, mostly unbranched. Upright shoots are clustered, mainly unbranched or sparsely branched near the base, 1.2-1.6 cm in diameter and to 20 cm or more in height; annual bud constrictions abrupt and conspicuous. Lateral branchlets few but without the annual constrictions. Leaves dark green, spreading to reflexed, linear-lanceolate (lance-shaped) 2.5 x 6 mm, stiff, sharp pointed, lacking a hair tip. Strobili (cone-like structure composed of overlapping scales bearing spore-containing structures) sessile at the ends of the shoots, solitary, 15-30 x 3.5-4.5 mm. Sporophylls (scales of the strobili) to 3.4 x 2 mm, abruptly narrowed to pointed tips.
In northwestern MT sporadically east to Stillwater County; AK to Greenland south to AZ, NM, OH, TN (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Mesic to wet forest; valleys to subalpine, occasionally alpine. A small form of this species can be found growing in Sphagnum moss at the margin of fens (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.