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Horizontal stems on substrate surface, 1.3--2.7 mm wide; leaves appressed to ascending, linear to narrowly lanceolate, 1.8--4.5 X 0.6--1.2 mm, apex acute, scarious, often lost. Upright shoots 15--50 cm, branching regularly successively to 3 times; leaves appressed with decurrent base, subulate, 1.8--3.5 X 0.6--1 mm, apex acute. Branchlets flat in cross section, narrowly bladelike, 2.8--3.9 mm wide, annual bud constrictions very rare; underside dull, pale, flat; upperside green, flat, shiny. Leaves of branchlets 4-ranked; upperside leaves appressed, linear-lanceolate, free portion of blade 0.7--1.5 X 0.5--0.9 mm; lateral leaves appressed to spreading (spreading especially in juvenile stages), 3.1--5.5 X 1--2 mm; underside leaves very weakly developed, spreading, narrowly deltate, 0.3--1 X 0.3--0.7 mm, apex pointed. Peduncles mostly 2, 4.4--12.5 X 0.1--1.3 cm; leaves usually somewhat whorled, linear-lanceolate to nearly filiform, 2--3.3 X 0.5--0.9 mm, apex blunt to acute. Stalks mostly pseudowhorled, 2-forked, forks basal. Strobili 2--4 per upright shoot, 14--40 X 2--3 mm exclusive of elongate sterile tip; sterile tips to 11 mm (occurring on ca. 50% of specimens), apex blunt to acute if sterile tip is absent. Sporophylls deltate, 1.7--2.6 X 1.8--2.8 mm, apex abruptly tapering. 2 n = 46.


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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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